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網頁設計作業.html
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網頁設計作業.html
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<!DOCTYPE html>
<html>
<script>
var temp=0;
var strOper=0;
var valueM=0;
function numBtn(str) {
if (strOper==null) {
document.getElementById("box").value = str;
strOper=0;
return;
};
if (document.getElementById("box").value==0) {
document.getElementById("box").value = str;
} else {
document.getElementById("box").value += str;
}
}
function operBtn(str){
equal();
valueA=document.getElementById("box").value;
strOper=str;
document.getElementById("box").value=0;
}
function equal(){
switch (strOper){
case '+':
document.getElementById("box").value=parseFloat(valueA)+parseFloat(document.getElementById("box").value);
break;
case '-':
document.getElementById("box").value=parseFloat(valueA)-parseFloat(document.getElementById("box").value);
break;
case '*':
document.getElementById("box").value=parseFloat(valueA)*parseFloat(document.getElementById("box").value);
break;
case '/':
document.getElementById("box").value=parseFloat(valueA)/parseFloat(document.getElementById("box").value);
break;
default:
break;
}
temp=null;
strOper=null;
}
function buttonM(str){
switch (str) {
case 'M+':
valueM += parseFloat(document.getElementById("box").value);
break;
case 'M-':
valueM -= parseFloat(document.getElementById("box").value);
break;
case 'MC':
temp=0;
strOper=0;
valueM=0;
document.getElementById("box").value = '0';
break;
case 'MR':
document.getElementById("box").value = parseFloat(valueM);
temp=null;
strOper=null;
break;
default:
break;
}
}
</script>
<body>
<table border=1>
<tr>
<td align="center" colspan="6">
<input align="right" type="text" value="0" id="box" />
</td>
</tr>
<tr>
<td > <input id="mAdd" type="button" value="M+" onClick="buttonM('M+')"> </td>
<td > <input id="mMinus" type="button" value="M-" onClick="buttonM('M-')"> </td>
<td > <input id="mC" type="button" value="MC" onClick="buttonM('MC')"> </td>
<td > <input id="mR" type="button" value="MR" onClick="buttonM('MR')"> </td>
</tr>
<tr align="center">
<td> <input type="button" value="7" onClick="numBtn('7')"> </td>
<td> <input type="button" value="8" onClick="numBtn('8')"> </td>
<td> <input type="button" value="9" onClick="numBtn('9')"> </td>
<td> <input type="button" value="+" onClick="operBtn('+')"> </td>
</tr>
<tr align="center">
<td> <input type="button" value="4" onClick="numBtn('4')"> </td>
<td> <input type="button" value="5" onClick="numBtn('5')"> </td>
<td> <input type="button" value="6" onClick="numBtn('6')"> </td>
<td> <input type="button" value="-" onClick="operBtn('-')"> </td>
</tr>
<tr align="center">
<td> <input type="button" value="1" onClick="numBtn('1')"> </td>
<td> <input type="button" value="2" onClick="numBtn('2')"> </td>
<td> <input type="button" value="3" onClick="numBtn('3')"> </td>
<td> <input type="button" value="*" onClick="operBtn('*')"> </td>
</tr>
<tr align="center">
<td> <input type="button" value="0" onClick="numBtn('0')"> </td>
<td> <input type="button" value="." onClick="numBtn('.')"> </td>
<td> <input type="button" value="=" onClick="equal()"> </td>
<td> <input type="button" value="/" onClick="operBtn('/')"> </td>
</tr>
</table>
</body>
</html>