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JavaScript - Need Help With Cash Register Program
I am 98% done with the Codecademy JS curriculum but I am stuck on this program. Can anyone see the problem?
Code: var cashRegister = {
total:0,
//Dont forget to add your property
lastTransactionAmount: 0;
add: function(itemCost) {
this.total += itemCost;
this.lastTransactionAmount = itemCost;
},
scan: function(item,quantity) {
switch (item) {
case "eggs": this.add(0.98 * quantity); break;
case "milk": this.add(1.23 * quantity); break;
case "magazine": this.add(4.99 * quantity); break;
case "chocolate": this.add(0.45 * quantity); break;
}
return true;
},
//Add the voidLastTransaction Method here
voidLastTransaction: function(){
this.total -= this.lastTransactionAmount;
},
};
cashRegister.scan('eggs',1);
cashRegister.scan('milk',1);
cashRegister.scan('magazine',1);
cashRegister.scan('chocolate',4);
//Void the last transaction and then add 3 instead
cashRegister.voidLastTransaction();
cashRegister.scan('chocolate',3);
//Show the total bill
console.log('Your bill is '+cashRegister.total);
Similar TutorialsHello fellow scriptwriters, Is it possible to use JavaScript cookies to function the same way as for registering for a site or logging in to a members' area? And if (or not)so, what are some things to help me get started? I'd like to know because I am planning to make an alternative to PHP and MySQL methods. Code: function getCookie( name ) {
var start = document.cookie.indexOf( name + "=" );
var len = start + name.length + 1;
if ( ( !start ) && ( name != document.cookie.substring( 0, name.length ) ) ) {
return null;
}
if ( start == -1 ) return null;
var end = document.cookie.indexOf( ";", len );
if ( end == -1 ) end = document.cookie.length;
return unescape( document.cookie.substring( len, end ) );
}
function setCookie( name, value, expires, path, domain, secure ) {
var today = new Date();
today.setTime( today.getTime() );
if ( expires ) {
expires = expires * 1000 * 60 * 60 * 24;
}
var expires_date = new Date( today.getTime() + (expires) );
document.cookie = name+"="+escape( value ) +
( ( expires ) ? ";expires="+expires_date.toGMTString() : "" ) + //expires.toGMTString()
( ( path ) ? ";path=" + path : "" ) +
( ( domain ) ? ";domain=" + domain : "" ) +
( ( secure ) ? ";secure" : "" );
}
function deleteCookie( name, path, domain ) {
if ( getCookie( name ) ) document.cookie = name + "=" +
( ( path ) ? ";path=" + path : "") +
( ( domain ) ? ";domain=" + domain : "" ) +
";expires=Thu, 01-Jan-1970 00:00:01 GMT";
}
Source: http://www.JavaScriptSource.com Hi all, I am rather stuck with the following code and am finding it tough to find resources to help me. I am new to DOM functions and any explanation would be much appreciated! Code: var DATE =
{date:
xxx, layers:
{top:
'topLayer'
},
ids: [xxx], go: function() {}
};
I also need to add a function to the variable 'DATE' so that it can register DOM events, then modify 'DATE' so that it adds another name-value pair to layers on page. I have been trying to working this out for 24 hours now and am very confused. Any support would be awesome! Thank you! Hey I am having trouble getting my javascript code to work. It seems to not register the event or even carry out the code. I have attached my code. index.php Code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html;charset=utf-8" />
<link rel="stylesheet" href="StyleSheet.css" type="text/css" />
<script type="text/javascript" src="register.js"></script>
<title>CollegeStop.com - Your stop for used college books!</title>
</head>
<body>
<div class="wrapper">
<div class="logo">Logo goes Here</div>
<div class="login_bar">
<form action="" method="post">
<table>
<tr>
<td>Email:</td>
<td><input type="text" name="email"></td>
<td>Password:</td>
<td><input type="password" name="password"></td>
<td><input type="submit" name="login" value="Login"/></td>
</tr>
</table>
</form>
<p>Not yet a member? <a href="index.php">Register</p>
</div>
<div class="nav_bar">
<ul class="menu">
<li class="home"><a href="index.php">Home</a></li>
<li class="browse"><a href="browse.php">Browse</a></li>
<li class="contact"><a href="contact.php">Contact</a></li>
</div>
<div class="content_container">
<div id="recent">
<p>box of recent additions to the site</p>
</div>
<div id="about_us">
<p>Hi and welcome to CollegeStop.com. This is a site dedicated to hopefully getting you a bit of a return
on the money you spent on books.</p>
</div>
<div id="registration">
<h5>Your password must be atleast six characters in length. Please enter a valid email as
it will be our method to ensure you get an account!</h5>
<form id="registration_form" action="" method="post">
<table>
<tr>
<td>First Name:</td>
<td><input type="text" id="firstName" name="first_name"/></td>
</tr>
<tr>
<td>Last Name:</td>
<td><input type="text" id="lastName" name="last_name"/></td>
</tr>
<tr>
<td>Email:</td>
<td><input type="text" id="intEmail" name="email_first"/></td>
</tr>
<tr>
<td>Retype Email:</td>
<td><input type="text" id="secEmail" name="email_second"/></td>
</tr>
<tr>
<td>Password:</td>
<td><input type="password" id="intPass" name="pass_first"/></td>
</tr>
<tr>
<td>Retype Password:</td>
<td><input type="password" id="secPass" name="pass_second"/></td>
</tr>
<tr>
<td><input type="submit" value="Register"/></td>
<td><input type="reset" value="Clear Form"/></td>
</tr>
</table>
</form>
<script type="text/javascript" src="registerR.js">
</script>
</div>
</div>
</div>
</div>
<div class="footer"><p>2012 © Hassan Said</p></div>
</body>
</html>
register.js Code: function checkReg(){
var firstName = document.getElementById("firstName");
var lastName = document.getElementById("lastName");
var intEmail = document.getElementById("intEmail");
var secEmail = document.getElementById("secEmail");
var intPassw = document.getElementById("intPass");
var secPassw = document.getElementById("secPass");
if((firstName == "")||(lastName == "")||(intEmail == "")||(secEmail == "")||
(intPassw == "")||(secPassw =="")){
alert("Please fill in all fields!");
firstName.focus();
return false;
}
}
registerR.js Code: document.getElementById("registration_form").onsubmit = checkRegister;
I need a count down clock that will count down 18 minutes and reset itself at the end. also i need a counter that increases by +1 every 18 minutes starting at 0. thankyou This is my code from prelim to finals. The missing part here is when the input is less than or equal to 65 and greater than 100, the prompt will say INVALID ENTRY. However, after it says Invalid Entry, it must ask you to enter again an Entry until you input a valid entry. It must be terminated after you input from prelim to finals either 0,20,30,40 or after you input a valid entry and after the program calculated it. My program does not terminate after I input valid entries. It just continue to ask grade again and again even it already calculated the grades. I don't know how will I put those code inside the program. I'm getting really confused. Code: <html>
<head>
<title>Web Programming Laboratory Exam</title>
</head>
<body>
<script language="JavaScript">
do
{
{
var pg=prompt('Enter Prelim Grade','0');
if(pg==0)
{
alert('No Grade');
document.write('<br>Prelim Grade is '+pg);
}
else if(pg==20)
{
alert('Not Attending');
document.write('<br>Prelim Grade is '+pg);
}
else if(pg==30)
{
alert('Dropped');
document.write('<br>Prelim Grade is '+pg);
}
else if(pg==40)
{
alert('Incomplete');
document.write('<br>Prelim Grade is '+pg);
}
else
document.write('Prelim Grade is '+pg);
var mg=prompt('Enter Midterm Grade','0');
}
{
if(mg==0)
{
alert('No Grade');
document.write('<br>Midterm Grade is '+mg);
}
else if(mg==20)
{
alert('Not Attending');
document.write('<br>Midterm Grade is '+mg);
}
else if(mg==30)
{
alert('Dropped');
document.write('<br>Midterm Grade is '+mg);
}
else if(mg==40)
{
alert('Incomplete');
document.write('<br>Midterm Grade is '+mg);
}
else
document.write('</br>Midterm Grade is '+mg);
var fg=prompt('Enter Final Grade','0');
}
{
if(fg==0)
{
alert('No Grade');
document.write('<br>Final Grade is '+fg);
}
else if(fg==20)
{
alert('Not Attending');
document.write('<br>Final Grade is '+fg);
}
else if(fg==30)
{
alert('Dropped');
document.write('<br>Final Grade is '+fg);
}
else if(fg==40)
{
alert('Incomplete');
document.write('<br>Final Grade is '+fg);
}
else
{
document.write('</br>Final Grade is '+fg);
sg=((pg*.3)+(mg*.3)+(fg*.4));
document.write('<br>Your Semestral Grade is '+sg);
}
}
if (sg>=74.5)
{
document.write('<br>Remarks: Passed');
document.write('</br>This Program is developed by -k3nN');
}
else
if (sg<74.5)
{
document.write('<br>Remarks:Failed');
document.write('</br>This Program is developed by -k3nN');
}
}
while (sg>=74.5|sg<74.5)
{
document.write('</br>Thanks')
}
</script>
</body>
</html>
Hello everyone. This is my first program. According to the idea of a program that calculates the sum of savings with the bank interest rates that is paid each year. And I put one amount every month. The question is very simple why full = 0? Code: var years = prompt("How many years will accumulate?)");
var prec = prompt("And how many % bank give?");
var income = prompt("How many you will put off in bank?");
var num = 12;
var full = 0;
months=years*num;
console.log("Altogether we get " + years + " years and " + months + " months.")
for (var month = 0; month == months; month++) {
if (month % num == 0) {
full = full + income + (full*prec/100);
} else {
full = full + income;
}
}
console.log("Total accumulated =" + full);
Reply With Quote 01-24-2015, 04:37 PM #2 leonfresh View Profile View Forum Posts New to the CF scene Join Date Jan 2015 Posts 8 Thanks 0 Thanked 0 Times in 0 Posts var full = 0 declares the variable as an integer variable. it's important to do so to avoid declaration errors. Reply With Quote 01-24-2015, 05:09 PM #3 jmrker View Profile View Forum Posts Senior Coder Join Date Aug 2006 Location FL Posts 3,175 Thanks 39 Thanked 510 Times in 504 Posts You have a logic problem. Try... Code: for (var month = 0; month<months; month++) {
Also note that your logic applies the full percentage at the 1st month of the loan/deposit. Is this what your really intended? Reply With Quote Users who have thanked jmrker for this post: Nadir+ (01-24-2015) 01-24-2015, 06:28 PM #4 Nadir+ View Profile View Forum Posts New to the CF scene Join Date Jan 2015 Posts 6 Thanks 1 Thanked 0 Times in 0 Posts i catch another problem, when i change this Code: for (var month = 0; month == months; month++) {
on this, Code: for (var month = 0; month<months; month++) {
program started work. But in rusults see this . Code: Altogether we get 1 years and 12 months. Total accumulated =01000100100100100100100100100100100100 all code there Code: var years = prompt("How many years will accumulate?)");
var prec = prompt("And how many % bank give?");
var income = prompt("How many you will put off in bank?");
var num = 12;
var full = 0;
months=years*num;
console.log("Altogether we get " + years + " years and " + months + " months.")
for (var month = 0; month < months; month++) {
if (month % num == 0) {
full = full + income + (full*prec/100);
} else {
full = full + income;
}
}
console.log("Total accumulated =" + full);
Reply With Quote 01-24-2015, 06:39 PM #5 Nadir+ View Profile View Forum Posts New to the CF scene Join Date Jan 2015 Posts 6 Thanks 1 Thanked 0 Times in 0 Posts i realized something if i delete var income and just put in its place 100, program work almost normal. Code: Altogether we get 2 years and 24 months. main.js:17 Total accumulated =2520 But if i write 1 year it dont work,how can i fix it? Code: Altogether we get 1 years and 12 months. main.js:17 Total accumulated =1200 Reply With Quote 01-24-2015, 09:42 PM #6 Old Pedant View Profile View Forum Posts Supreme Master coder! Join Date Feb 2009 Posts 28,310 Thanks 82 Thanked 4,754 Times in 4,716 Posts The value you get from a call to prompt() is *ALWAYS* a string. When you use the + operator with a string, it does *NOT* do addition; it does string concatenation. You just need to convert all those prompt() results to numbers: Code: var years = Number( prompt("How many years will accumulate?") );
var prec = Number( prompt("And how many % bank give?") );
var income = Number( prompt("How many you will put off in bank?") );
Also, you need to do Code: for (var month = 0; month <= months; month++) {
else you will only do (for example) up to month 23 when the user asks for 2 years. Be aware that prompt() and confirm() and console.log() are considered VERY obsolete and should only be used for debugging purposes, not for real web code. I have an assignment to create a program in JS but I have not read JS much more. So, for this assignment, can anyone help me to solve this assignment? Check attachment. Uploaded with ImageShack.us I wrote about this script a couple weeks ago. I stopped working on it, and just got on it today. Question, what's the easiest way to have it so Monday, tuesday, Wednesday, etc and then the total amount of hours gets added. Code: <html>
<head>
<script language="JavaScript" src="gen_validatorv5-.js"
type="text/javascript" xml:space="preserve"></script>
<script type="text/javascript">
function calc(nForm){
var inHour =parseInt( nForm.inHr.value)
var inMinutes = parseInt( nForm.inMin.value);
var lunchOutHour = parseInt(nForm.lunchOutHr.value);
var lunchOutMinutes = parseInt( nForm.lunchOutMin.value);
var lunchInHour = parseInt( nForm.lunchInHr.value);
var lunchInMinutes = parseInt( nForm.lunchInMin.value);
var outHour = parseInt( nForm.outHr.value);
var outMinutes = parseInt( nForm.outMin.value);
var linearInTime = 60*(inHour)+(inMinutes);
var linearLunchOutTime = 60*(lunchOutHour)+(lunchOutMinutes);
var linearLunchInTime = 60*(lunchInHour)+(lunchInMinutes);
var linearOutTime = 60*(outHour)+(outMinutes);
var workDay = linearOutTime-linearInTime;
var lunchPeriod = linearLunchInTime-linearLunchOutTime;
var linearMinutesWorked = workDay-lunchPeriod;
var hoursWorked = parseInt(linearMinutesWorked/60);
var minutesWorked = linearMinutesWorked-(hoursWorked*60)
if (hoursWorked < 10){hoursWorked = "0"+hoursWorked}
if (minutesWorked < 10){minutesWorked = "0"+minutesWorked}
nForm.timeWorked.value = hoursWorked+":"+minutesWorked;
}
</script>
</head>
<body>
<div align="center">
<h1>
<script src='scripts/gen_validatorv5.js' type='text/javascript'></script>
<script src='scripts/sfm_moveable_popup.js' type='text/javascript'></script>
<style type='text/css'>
.error_strings
{
font-family:Verdana;
font-size:10px;
color:#660000;
}
.sfm_float_error_box
{
position:absolute;
z-index:999;
cursor:default;
font-family:Verdana;
font-size:10px;
color:#660000;
background-color:#ffff66;
border-style:solid;
border-width:1px;
border-color:#660000;
}
.sfm_float_box_td
{
padding:3px;
cursor:default;
font-family:Verdana;
font-size:10px;
color:#660000;
background-color:#ffff66;
}
.sfm_close_box
{
font-family:Verdana;
font-size:10px;
font-weight:bold;
color:#ffffff;
background-color:#660000;
border-width:0px;
text-align:center;
}
.sfm_cr_box
{
font-family:Verdana;
font-size:10px;
color:#888888;
border-style:solid;
border-width:0px;
border-color:#660000;
}
.sfm_cr_box a
{
color:#888888;
}
</style>
Masquerade Timesheet Entry</h1>
</div>
<div id='timeSheet_errorloc' class='error_strings' style=''></div>
<form name='timeSheet'>
<table width="833" height="244" border="1" align="center">
<tr>
<td width="266"><p align="left">Monday :</p>
Clock In:
<label>
<input name="inHr" type="text" id="inHr" size="10" maxlength="2">
</label>
 
<label>
<input name="inMin" type="text" id="inMin" size="10" maxlength="2">
</label>
<br>
Lunch Out:
<label>
<input name="lunchOutHr" type="text" id="lunchOutHr" size="10" maxlength="2">
</label>
 
<label></label>
<input name="lunchOutMin" type="text" id="lunchOutMin" size="10" maxlength="2">
<br>
Lunch In:
<label>
<input name="lunchInHr" type="text" id="lunchInHr" size="10" maxlength="2">
</label>
 
<label>
<input name="lunchInMin" type="text" id="lunchInMin" size="10" maxlength="2">
</label>
<br>
Clock Out:
<label>
<input name="outHr" type="text" id="outHr" size="10" maxlength="2">
</label>
 
<label>
<input name="outMin" type="text" id="outMin" size="10" maxlength="2">
</label>
<p>Time Worked:
<input type='text' name='timeWorked' size='5' readonly>
</p></td>
<td width="269"><p>Tuesday:</p>
<p>Clock In:
<label>
<input name="inHr2" type="text" id="inHr2" size="10" maxlength="2">
</label>
 
<label>
<input name="inMin2" type="text" id="inMin2" size="10" maxlength="2">
</label>
<br>
Lunch Out:
<label>
<input name="lunchOutHr2" type="text" id="lunchOutHr2" size="10" maxlength="2">
</label>
 
<label></label>
<input name="lunchOutMin2" type="text" id="lunchOutMin2" size="10" maxlength="2">
<br>
Lunch In:
<label>
<input name="lunchInHr2" type="text" id="lunchInHr2" size="10" maxlength="2">
</label>
 
<label>
<input name="lunchInMin2" type="text" id="lunchInMin2" size="10" maxlength="2">
</label>
<br>
Clock Out:
<label>
<input name="outHr2" type="text" id="outHr2" size="10" maxlength="2">
</label>
 
<label>
<input name="outMin2" type="text" id="outMin2" size="10" maxlength="2">
</label>
</p>
<p>Time Worked:
<input type='text' name='timeWorked2' size='5' readonly>
</p></td>
<td width="276"><p>Wednesday:</p>
<p>Clock In:
<label>
<input name="inHr3" type="text" id="inHr3" size="10" maxlength="2">
</label>
 
<label>
<input name="inMin3" type="text" id="inMin3" size="10" maxlength="2">
</label>
<br>
Lunch Out:
<label>
<input name="lunchOutHr3" type="text" id="lunchOutHr3" size="10" maxlength="2">
</label>
 
<label></label>
<input name="lunchOutMin3" type="text" id="lunchOutMin3" size="10" maxlength="2">
<br>
Lunch In:
<label>
<input name="lunchInHr3" type="text" id="lunchInHr3" size="10" maxlength="2">
</label>
 
<label>
<input name="lunchInMin3" type="text" id="lunchInMin3" size="10" maxlength="2">
</label>
<br>
Clock Out:
<label>
<input name="outHr3" type="text" id="outHr3" size="10" maxlength="2">
</label>
 
<label>
<input name="outMin3" type="text" id="outMin3" size="10" maxlength="2">
</label>
</p>
<p>Time Worked:
<input type='text' name='timeWorked3' size='5' readonly>
</p></td>
</tr>
<tr>
<td><p>Thursday:</p>
<p>Clock In:
<label>
<input name="inHr4" type="text" id="inHr4" size="10" maxlength="2">
</label>
 
<label>
<input name="inMin4" type="text" id="inMin4" size="10" maxlength="2">
</label>
<br>
Lunch Out:
<label>
<input name="lunchOutHr4" type="text" id="lunchOutHr4" size="10" maxlength="2">
</label>
 
<label></label>
<input name="lunchOutMin4" type="text" id="lunchOutMin4" size="10" maxlength="2">
<br>
Lunch In:
<label>
<input name="lunchInHr4" type="text" id="lunchInHr4" size="10" maxlength="2">
</label>
 
<label>
<input name="lunchInMin4" type="text" id="lunchInMin4" size="10" maxlength="2">
</label>
<br>
Clock Out:
<label>
<input name="outHr4" type="text" id="outHr4" size="10" maxlength="2">
</label>
 
<label>
<input name="outMin4" type="text" id="outMin4" size="10" maxlength="2">
</label>
</p>
<p>Time Worked:
<input type='text' name='timeWorked4' size='5' readonly>
</p></td>
<td><p>Friday:</p>
<p>Clock In:
<label>
<input name="inHr5" type="text" id="inHr5" size="10" maxlength="2">
</label>
 
<label>
<input name="inMin5" type="text" id="inMin5" size="10" maxlength="2">
</label>
<br>
Lunch Out:
<label>
<input name="lunchOutHr5" type="text" id="lunchOutHr5" size="10" maxlength="2">
</label>
 
<label></label>
<input name="lunchOutMin5" type="text" id="lunchOutMin5" size="10" maxlength="2">
<br>
Lunch In:
<label>
<input name="lunchInHr5" type="text" id="lunchInHr5" size="10" maxlength="2">
</label>
 
<label>
<input name="lunchInMin5" type="text" id="lunchInMin5" size="10" maxlength="2">
</label>
<br>
Clock Out:
<label>
<input name="outHr5" type="text" id="outHr5" size="10" maxlength="2">
</label>
 
<label>
<input name="outMin5" type="text" id="outMin5" size="10" maxlength="2">
</label>
</p>
<p>Time Worked:
<input type='text' name='timeWorked5' size='5' readonly>
</p></td>
<td><div align="left">
<p>
<input type='button' value="Calculate" onClick="calc(this.form)">
<input type="button" name="reset_form" value="Clear Forms" onClick="this.form.reset();">
</p>
<p>Total Time Worked:
<input type="text" name="totalhr" id="totalhr">
</p>
<label></label>
</div></td>
</tr>
</table>
<p align="left"> </P>
<p align="left"> </P>
<p align="left"> </P>
<p align="left"> </P>
<p><br>
<br>
<br>
<br>
</p>
</form
><p> </p>
<p> </p>
</body>
</html>
Hello people CF, I need some help with this Javascipt program that im trying to make. Ill provide you with the algorithm i have made and the javascript code. I only know basic javascripting and i had a lot of help with this. I need help getting the javascript code for comparing last date modified, renaming the copied file with last date modified, also i can get it to copy 1 file, but i need it to loop through all the files in the given folder. Algorithm Code: // get source and destination folder path // check if folder exists // if source folder exists, continue with the process, otherwise display an error message // if destination folder exists, proceed with transferring the files // get the file collections in the source folder // loop through each file to check if the file has been modified // if the file exists, check file attributes to the source file; 32 means file has changed // if file has changed, // compare the last date modified of the source and destination file // if the source last date modified is greater than the destination last date modified then // rename the destination file by appending the last date modified // to its file name and then transfer the lastest file from the source folder // otherwise, no need to copy the file and move to the next file // otherwise, do nothing and move on to the next file // otherwise, create a folder first before proceeding with transferring the files I had a lot of help with this Code: <HTML>
<HEAD>
<TITLE>FileSystem Object Demo</TITLE>
<SCRIPT> Language = "JavaScript">
<!--hide from old browsers
function checkExistingFolder(folder)
{
var FS = new ActiveXObject("Scripting.FileSystemObject");
return FS.FolderExists(folder);
}
function createFolder(folder)
{
var FS = new ActiveXObject("Scripting.FileSystemObject");
FS.createFolder(folder);
document.write ("<BR>New folder created.");
}
function copyFile(source, dest)
{
var FS = new ActiveXObject("Scripting.FileSystemObject");
FS.copyFile(source + "\\Test.txt", dest + "\\Test.txt");
document.write ("<BR>File Copied.");
}
function runProgram ()
{
var from = document.getElementById('from').value;
var to = document.getElementById('to').value;
var isExist = checkExistingFolder(to);
alert(isExist);
if(isExist)
document.write("Folder Exists, checking last date modified........");
else
{
document.write("Folder doesn't exist.");
createFolder(to);
}
copyFile(from, to);
}
// -->
</SCRIPT>
</HEAD>
<BODY background="1330843076080.jpg">
<CENTER>
<H1>FileSystem Object Demo</H1>
FROM: <input type="text" id="from" value=""/>
TO: <input type="text" id="to" value="d:\\test"/>
<input type="button" onClick="runProgram()" value="Transfer Files"/>
<SCRIPT LANGUAGE = "JavaScript">
<!--hide from old browsers
// -->
</SCRIPT>
</CENTER>
</BODY>
</HTML>
<script type="text/javascript"> var myString = "zero one two three four"; var mySplitResult = myString.split(" "); for(i = 0; i < mySplitResult.length; i++){ document.write("<br /> Element " + i + " = " + mySplitResult[i]); } </script> "split" function splits the string whenever it encounters "space". But please explain me how the strings are stored in "mySplitResult". And can we use Arrays for this program? If so, can you code it. Thanks in advance! For class NumericQuestion Add setAnswer, a method that takes a double as input, converts it to a string and calls setAnswer in the superclass Question to store the answer. o Add checkAnswer, a method that takes an answer in string form, converts it to a double, gets the correct answer in string form from Question, converts it to a double, and returns true if they are within 0.01 of each other and false otherwise. For class quiz Change main so that all three questions are asked. presentQuestion that prints out the correct answer, only when the answer is wrong public class NumericQuestion { private String text; private Double answer; /** * Constructs a question with empty question and answer. */ public NumericQuestion() { text = ""; answer = 3.1416; } /** * Sets the question text. * @param questionText the text of this question */ public void setText(String questionText) { text = questionText; } /** * Sets the answer for this question. * @param correctResponse the answer */ public void setAnswer(Double correctResponse) { answer = correctResponse; } /** * Checks a given response for correctness. * @param response the response to check * @return true if the response was correct, false otherwise */ public boolean checkAnswer(String response) { return response.equals(answer); } /** * Displays this question. */ public void display() { System.out.println(text); } } import java.util.Scanner; public class Quiz { public static void main(String[] args) { Question first = new Question(); first.setText("What inherits data and behavior from a superclass?"); first.setAnswer("subclass"); ChoiceQuestion second = new ChoiceQuestion(); second.setText("Which modifies the object on which it operates in some way?"); second.addChoice("Accessor", false); second.addChoice("Mutator", true); second.addChoice("Method", false); second.addChoice("Variable", false); NumericQuestion third = new NumericQuestion(); third.setText("What is the numeric value for PI?"); third.setAnswer(3.1416); presentQuestion(first); presentQuestion(second); //presentQuestion(third); } /** Presents a question to the user and checks the response. @param q the question */ public static void presentQuestion(Question q) { q.display(); System.out.print("Your answer: "); Scanner in = new Scanner(System.in); String response = in.nextLine(); System.out.println(q.checkAnswer(response)); } } Im writing this code for a gas station program. I have been writing and improving my code for about 3 weeks now and its quite long. I have about classes , customer class, office class and a gas pumps classes. I need help on how to get started on finding the total output at the end of the day. Conceptually i know what i have to do but I don't know where to begin writing the code. I think each time there is a new customer i should add the amount of fuel purchased to a new total fuel purchases variable in the gas pump class. If any one could give me some advice or tips on my theory it would be great ! Should I create a method or can i be done without one. Code: import java.util.Random;
import java.util.Scanner;
public class Customer
{
private String carTag;
private double gasPurchased;
private int gasType;
public Customer ()
{
Random gen = new Random ( );
carTag = "";
for (int i = 1; i <= 6; i++)
{
//a random number between 48 and 90
int code = gen.nextInt (43)+ 48;
if ((code <= 64) && (code >= 58))
{
i--;
continue;
}
carTag += ((char)(code));
}
System.out.println ("a car arrives; tag number:" + carTag);
}
public int getGasType ()
{
Scanner inputDevice = new Scanner (System.in);
//1:regular, 2:plus, 3:premium
System.out.println ("enter type of gas to buy " +
"(1:regular, 2:plus, 3:premium): ");
gasType = inputDevice.nextInt ();
return gasType;
}
public double getGasPurchased ()
{
Random gen = new Random ();
gasPurchased = gen.nextDouble ()* 50;
return gasPurchased;
}
public String getCarTag ()
{
return carTag;
}
Code: import java.util.Random;
public class Office
{
public static void main (String [ ] args)
{
double regularTank = 1000;
double plusTank = 1000;
double primiumTank = 1000;
GasPump pump1 = new GasPump ( );
GasPump2 pump2 = new GasPump2 ( );
Random gen = new Random ();
//asuumint gas tanks always have gas, will upgrade later
do
{
int whatHappens = gen.nextInt (100);
if (whatHappens == 5)
{
System.out.println ("gas station closed");
break;
}
else if ((whatHappens % 10) == 0)
{
if (pump1.pumpAvailable ())
pump1.customerArrival ();
else
System.out.println ("a new customer arrives at pump 1, but is turned away, gas pump is busy");
}
else
{
if (pump1.pumpAvailable ())
System.out.println ("no customer; waiting.........");
}
if (!pump1.pumpAvailable())
{
if (pump1.updateClock () == 0)
pump1.saleComplete ();
}
} while (true);
do
system.exit ()
Code: public class GasPump
{
final private double REGULAR_PRICE = 3.15;
final private double PLUS_PRICE = 3.5;
final private double PREMIUM_PRICE = 4.5;
final private double HOSE_FLOW_RATE = 0.85;
private double totalPayment;
private Customer who;
private int timeLeftToFinish;
private int gasType;
private double gasPurchased;
private String carTag;
public GasPump ()
{
who = null;
totalPayment = 0;
timeLeftToFinish = 0;
}
public void customerArrival ()
{
who = new Customer ();
System.out.println ("welcome to jack's gas station PUMP 1 ");
gasType = who.getGasType ();
gasPurchased = who.getGasPurchased ();
timeLeftToFinish = (int)(gasPurchased/HOSE_FLOW_RATE);
System.out.println (timeLeftToFinish + " total time units needed for this transaction...");
carTag = who.getCarTag ();
}
private void printReceipt ( )
{
System.out.println ("****Sale Receipt");
switch (gasType)
{
case 1: System.out.println ("regular gas"); break;
case 2: System.out.println ("plus gas"); break;
case 3: System.out.println ("premium gas"); break;
}
System.out.println ("gas amount: " + gasPurchased +
"\ntotal payment" + totalPayment + "\nthank you");
System.out.println("Pump has " + regularTank());
}
private void resetPump ( )
{
who = null;
totalPayment = 0;
timeLeftToFinish = 0;
}
public int updateClock ()
{
timeLeftToFinish--;
System.out.println (timeLeftToFinish + " time units left to finish ");
return timeLeftToFinish;
}
public void saleComplete ( )
{
switch (gasType)
{
case 1: totalPayment = REGULAR_PRICE * gasPurchased; break;
case 2: totalPayment = PLUS_PRICE * gasPurchased; break;
case 3: totalPayment = PREMIUM_PRICE * gasPurchased; break;
}
printReceipt ( );
resetPump ( );
}
public boolean pumpAvailable ()
{
return (who == null);
}
}
im looking to make a program for my site to where somebody can type something in and it will go onto a image like a userbar and then they can save that image with the txt the choose to go over it, does anybody have any advice for me to use? I'm very new at Javascript and writing programs so I'm not sure if this is even possible to do. I want to write a program that allows someone to select four tasks from a dropdown menu. The tasks are each 1 hour long. I want the program to calculate the number of hours and display that information below the tasks. I also want the person to be able to add or remove tasks. I get how to save tasks and display the results but I don't know how to calcuate the number of hours. Any suggestions? Here is what I have so far: Code: <!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Four Tasks</title>
<style>
body {
background-color:silver;
font-family:Arial, Helvetica, sans-serif;
font-size:1.2em;
}
h1 {
font-family:Arial, Helvetica, sans-serif;
font-size:1.4em;
}
</style>
<script>
function storeTask(task) {
var taskDetail = document.getElementById(task).value;
localStorage.setItem(task, taskDetail);
}
function getTask(task) {
document.getElementById(task).value = localStorage.getItem(task);
}
function clearTask(task) {
localStorage.removeItem(task);
document.getElementById(task).value="";
}
function displayTasks() {
outputResults = document.getElementById("Results");
outputResults.innerHTML =
'Task 1: ' + localStorage.getItem('task1') + '<br />' +
'Task 2: ' + localStorage.getItem('task2') + '<br />' +
'Task 3: ' + localStorage.getItem('task3') + '<br />' +
'Task 4: ' + localStorage.getItem('task4') + '<br />' +
'';
}
</script>
</head>
<body>
<table width="100%">
<tr>
<td valign="top">
<div id="outer">
<h1>Four Tasks</h1>
My To Do List:
<br><br>
Task 1:
<select id="task1">
<option>Laundry</option>
<option>Cooking</option>
<option>Dishes</option>
<option>Water Plants</option>
<input type="button" value="Save" onclick="storeTask('task1');">
<input type="button" value="Clear" onclick="clearTask('task1');">
<br><br>
Task 2:
<select id="task2">
<option>Laundry</option>
<option>Cooking</option>
<option>Dishes</option>
<option>Water Plants</option>
<input type="button" value="Save" onclick="storeTask('task2');">
<input type="button" value="Clear" onclick="clearTask('task2');">
<br><br>
Task 3:
<select id="task3">
<option>Laundry</option>
<option>Cooking</option>
<option>Dishes</option>
<option>Water Plants</option>
<input type="button" value="Save" onclick="storeTask('task3');">
<input type="button" value="Clear" onclick="clearTask('task3');">
<br><br>
Task 4:
<select id="task4">
<option>Laundry</option>
<option>Cooking</option>
<option>Dishes</option>
<option>Water Plants</option>
<input type="button" value="Save" onclick="storeTask('task4');">
<input type="button" value="Clear" onclick="clearTask('task4');">
</div>
</td>
<td valign="top">
My Tasks:
<br>
<input type="button" value="Display tasks" onclick="displayTasks();">
<div id="Results"></div>
</td>
</tr>
</table>
</body>
</html>
Basically i have an image of a ball that i am trying to make bounce from top to bottom so far it is just going to the bottom and stopping plz help thanks <head> <title></title> </head> <body> <center> <input type="button" value="Click" onClick="moveDown()"/> </center> <img id="Ball" src="ball.jpg" style="position:absolute; top:100px; left:100px;"/> <script language="JavaScript"> var Image = document.getElementById("Ball"); var Position = 100; var direction = 1; function moveDown() { if(direction > 0) { Image.style.top = parseInt(Image.style.top) + 20+'px'; } if(parseInt(Image.style.top)> 100 || direction > 1 ) direction = 1 if(parseInt(Image.style.top)> 500 || direction < 1 ) { direction = -1 Image.style.top = parseInt(Image.style.top) - 20+'px'; } } setInterval ("moveDown()", 50 ); </script> </body> </html> Im trying to write a program that determines if an array is Ragged or not. I'm fairly new to writing programs in javascript and need a little help with this program. So far I have the following and need to write the program aspect for it. Thanks for taking a look for me. Code: document.writenln("Ragged or not<br />")
if (raggedOr(a))
document.writenln("Array is Ragged");
else
document.writenln("Array is not Ragged");
raggedOr was going to be the name of the function. i noticed the majority of the time when i practice coding javascript and run it, it never runs in the order i want it to. WHY?! like for example, if i want something to happen ONLY WHEN A BUTTON IS CLICKED, it would instead happen on page load :S its soooo frustrating heres one of my practice code which illustrates this problem. This code is suppose the stretch a div only wen it is clicked on. Code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>Untitled Document</title>
</head>
<body>
<div id="mybutton" style="height:50px; width:50px; background-color:#C00;"></div>
</body>
<script type="text/javascript">
var left = 0;
var funct = function () {
//alert("Thank you for clicking me");
left +=10;
b.style.height = left + 'px';
if(left < 100) {
var id = setTimeout(funct, 10);
}
}
var b = document.getElementById("mybutton");
b.onclick = funct();
</script>
</html>
overImg=[];outImg=[]; outImg[0]=new Image();outImg[0].src="images/enter1.gif"; overImg[0]=new Image();overImg[0].src="images/enter2.gif"; outImg[1]=new Image();outImg[1].src="images/keio.gif"; overImg[1]=new Image();overImg[1].src="images/inria.gif"; function chgImg(img,type){ switch(type){ case "over":document.images[img].src=overImg[img].src;break; case "out":document.images[img].src=outImg[img].src;break; }} why are arrays used here ? Hi everyone , I have been working with java script for a couple of weeks now and have run into some practice obstacles, ok so I am trying to build a html java program for my website and I wants there to be a web page in which users can dynamically change the styles of page elements (e.g.,background, text) by typing the style name into a dialog box. So basically enter a word and the that word should be set to change the attributes once entered in. Ive tried working with if else statements but have run into many problems. Again I am a beginner and am trying to self teach myself if you all could help me that would be great. Thanks Sash I am trying to make a fairly simple program for practicing for a mid-term that is coming up in my intro to programming class and I need some help figuring out how to create the function/setting up the variables. Essentially what the code is, is a program that adds up the values put in 5 text boxes, the values from checkboxes that are selected, and the value of a selected radio button. I do not think I have the variables named correctly, and I have no idea how to create the function. I will post what I have so far so you can get a better idea of what it is I'm trying to make. It's so simple, just adding up everything. I just need help figuring out how to achieve that... Here is the code I have so far: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Computer Price Caculator</title> <script type="text/javascript"> function calc() { with( document.frmCom ) { var P = setPerepherals.selectedIndex; var S = setShipping.selectedIndex; var total = P + S; display.value = "Your systems total price is:" setPerepherals.value[P].text + setShipping.value[S].text + "\n Total:\t$" + total.toFixed(2); }//end with }//end calc() </script> <style type="text/css"> .auto-style1 { margin-left: 17px; } </style> </head> <body background="PracticeMidterm/bg.jpg"> <center> <h1> <img src="PracticeMidterm/Computer.jpg" height="124" width="179">Computer Price Calculator</h1> <hr class="auto-style1" style="width: 784px" /> <form name="frmCom"> <table style="border:thin black solid"> <tr> <td colspan="2" width="700" align="center"> Processor (CPU): <input type="text" align="middle" name="textCPU"></input> <br/> Motherboard: <input type="text" name="textMotherboard" ></input><br/> Case: <input type="text" name="textCase" ></input><br/> Power Supply: <input type="text" name="textPowersupply" ></input><br/> Monitor: <input type="text" name="textMonitor" ></input> </td></tr> <tr> <td align="center"><hr width="500" align="center" /></td> </tr> <tr> <td colspan="1" align="center"> Perepherals: <input type="checkbox" align="middle" name="checkboxKeyboard" value="25.00" onclick="setPerepherals()" >Keyboard ($25.00)</input> <br/><input type="checkbox" align="middle" name="checkboxMouse" value="10.00" onclick="setPerepherals()" >Mouse ($10.00)</input> <br/><input type="checkbox" align="middle" name="checkboxTablet" value="60.00" onclick="setPerepherals()" >Tablet ($60.00)</input> </td> </tr> <tr> <td align="center"><hr width="500" align="center" /></td> </tr> <tr> <td colspan="1" align="center"> Shipping: <input type="radio" align="middle" name="radShipping" value="5.00" onclick="setShipping()" >Ground ($5.00)</input> <br/><input type="radio" align="middle" name="radShipping" value="10.00" onclick="setShipping()" >Second Day Air ($10.00)</input> <br/><input type="radio" align="middle" name="radShipping" value="15.00" onclick="setShipping()" >Overnight Air ($15.00)</input> </td> </tr> <tr> <td align="center"><hr width="500" align="center" /></td> </tr> <tr> <td colspan="1" align="center"><input value="Calculate price" type="button" /></td> </tr> <tr> <td colspan="1" align="center"><textarea name="display" rows="10" cols="40">Total Price:</textarea></td> </tr> </table> *******For more information visit <a href="http://www.howstuffworks.com/pc.htm">How Computers Work.</a>******* </form> </center> </body> </html> |
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