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page_full_width" class="col-xs-12" |cond="$__Context->page_full_width">
자바스크립트용 계산기 v1.0
2003.01.09 22:44
<HTML>
<HEAD>
<TITLE>자바스크립트 - 계산기 예제</TITLE>
</HEAD>
<body>
<center>
<script language="JavaScript">
<!-- Hide all this from non javascript browsers
NaN=0; // if someone typed characters and not digits we assume the value 0
var stack=0; // used to save the first value
var op='+'; // used to save the operator
var assume_equals=false; // used to calculate sum when didn't click '='
var nnum=true; // the first number is a new number
function digitpress(val) { // pressed a digit
if (nnum==false) { // append digit to digits currently on the screen
document.calc.screen.value = document.calc.screen.value+val;
}
else { // starting a new number
stack = parseFloat(document.calc.screen.value); // save prev number
document.calc.screen.value = val; // show new digit
nnum=false; // subsequent numbers get appended
}
return(true);
}
function pushop(s) { // pressed an operator (one of +, -, *, / or =)
if (s=='=' || assume_equals==true) { // we should update total on the screen
// grab the number on the screen now
v = parseFloat(document.calc.screen.value);
// catch division by zero
if (!(op == '/' && v == 0)) {
// work out the sum and put the result on the screen
document.calc.screen.value = eval((stack) + op + v);
if (s != '='+ ') { // save the operator and the current total
op = s;
stack = parseFloat(document.calc.screen.value);
}
else {
assume_equals = false; // this was an '=' so don't total on next op
}
}
else { // division by zero so display error message
document.calc.screen.value = "Error";
assume_equals = false; // this was an error so don't total on next op
}
nnum = true;
}
else { // otherwise save the current value and the op
assume_equals = true; // give total on next op
stack = parseFloat(document.calc.screen.value); // save current total
nnum=true; // next number to be entered is a new one
op=s; // remember the operator just typed
}
return(true);
}
// End of all the hidden stuff -->
</script>
<FORM name=calc METHOD="POST">
<TABLE border=1 align=center>
<tr align=center><td colspan=5 align=center><INPUT TYPE="float" NAME="screen" VALUE="0" SIZE=20,1 MAXLENGTH=20>
<tr align=center>
<TD> <INPUT TYPE="button" NAME="one" VALUE=" 1 " onClick="digitpress(1)">
<TD> <INPUT TYPE="button" NAME="two" VALUE=" 2 " onClick="digitpress(2)">
<TD> <INPUT TYPE="button" NAME="three" VALUE=" 3 " onClick="digitpress(3)">
<TD> <input type="button" name="plus" value=" + " onClick="pushop('+')">
<TD> <input type="button" name="clear" value=" 계산! " onClick="document.calc.screen.value=0;if (nnum==true) nnum = false;">
<TR align=center>
<td><INPUT TYPE="button" NAME="four" VALUE=" 4 " onClick="digitpress(4)">
<td><INPUT TYPE="button" NAME="five" VALUE=" 5 " onClick="digitpress(5)">
<td><INPUT TYPE="button" NAME="six" VALUE=" 6 " onClick="digitpress(6)">
<td><input type="button" name="minus" value=" - " onClick="pushop('-')">
<td></td>
<tr align=center>
<td><INPUT TYPE="button" NAME="seven" VALUE=" 7 " onClick="digitpress(7)">
<td><INPUT TYPE="button" NAME="eight" VALUE=" 8 " onClick="digitpress(8)">
<td><INPUT TYPE="button" NAME="nine" VALUE=" 9 " onClick="digitpress(9)">
<td><input type="button" name="times" value=" * " onClick="pushop('*')">
<td></td>
<tr align=center>
<td><INPUT TYPE="button" NAME="zero" VALUE=" 0 " onClick="digitpress(0)">
<td><INPUT TYPE="button" NAME="dot" VALUE=" . " onClick="digitpress('.'+ ')">
<TD><input type="button" name="equal" value=" = " onClick="pushop('=')">
<td><input type="button" name="divide" value=" / " onClick="pushop('/')">
<td></td>
</TABLE>
</FORM>
</body>
</html>
<HEAD>
<TITLE>자바스크립트 - 계산기 예제</TITLE>
</HEAD>
<body>
<center>
<script language="JavaScript">
<!-- Hide all this from non javascript browsers
NaN=0; // if someone typed characters and not digits we assume the value 0
var stack=0; // used to save the first value
var op='+'; // used to save the operator
var assume_equals=false; // used to calculate sum when didn't click '='
var nnum=true; // the first number is a new number
function digitpress(val) { // pressed a digit
if (nnum==false) { // append digit to digits currently on the screen
document.calc.screen.value = document.calc.screen.value+val;
}
else { // starting a new number
stack = parseFloat(document.calc.screen.value); // save prev number
document.calc.screen.value = val; // show new digit
nnum=false; // subsequent numbers get appended
}
return(true);
}
function pushop(s) { // pressed an operator (one of +, -, *, / or =)
if (s=='=' || assume_equals==true) { // we should update total on the screen
// grab the number on the screen now
v = parseFloat(document.calc.screen.value);
// catch division by zero
if (!(op == '/' && v == 0)) {
// work out the sum and put the result on the screen
document.calc.screen.value = eval((stack) + op + v);
if (s != '='+ ') { // save the operator and the current total
op = s;
stack = parseFloat(document.calc.screen.value);
}
else {
assume_equals = false; // this was an '=' so don't total on next op
}
}
else { // division by zero so display error message
document.calc.screen.value = "Error";
assume_equals = false; // this was an error so don't total on next op
}
nnum = true;
}
else { // otherwise save the current value and the op
assume_equals = true; // give total on next op
stack = parseFloat(document.calc.screen.value); // save current total
nnum=true; // next number to be entered is a new one
op=s; // remember the operator just typed
}
return(true);
}
// End of all the hidden stuff -->
</script>
<FORM name=calc METHOD="POST">
<TABLE border=1 align=center>
<tr align=center><td colspan=5 align=center><INPUT TYPE="float" NAME="screen" VALUE="0" SIZE=20,1 MAXLENGTH=20>
<tr align=center>
<TD> <INPUT TYPE="button" NAME="one" VALUE=" 1 " onClick="digitpress(1)">
<TD> <INPUT TYPE="button" NAME="two" VALUE=" 2 " onClick="digitpress(2)">
<TD> <INPUT TYPE="button" NAME="three" VALUE=" 3 " onClick="digitpress(3)">
<TD> <input type="button" name="plus" value=" + " onClick="pushop('+')">
<TD> <input type="button" name="clear" value=" 계산! " onClick="document.calc.screen.value=0;if (nnum==true) nnum = false;">
<TR align=center>
<td><INPUT TYPE="button" NAME="four" VALUE=" 4 " onClick="digitpress(4)">
<td><INPUT TYPE="button" NAME="five" VALUE=" 5 " onClick="digitpress(5)">
<td><INPUT TYPE="button" NAME="six" VALUE=" 6 " onClick="digitpress(6)">
<td><input type="button" name="minus" value=" - " onClick="pushop('-')">
<td></td>
<tr align=center>
<td><INPUT TYPE="button" NAME="seven" VALUE=" 7 " onClick="digitpress(7)">
<td><INPUT TYPE="button" NAME="eight" VALUE=" 8 " onClick="digitpress(8)">
<td><INPUT TYPE="button" NAME="nine" VALUE=" 9 " onClick="digitpress(9)">
<td><input type="button" name="times" value=" * " onClick="pushop('*')">
<td></td>
<tr align=center>
<td><INPUT TYPE="button" NAME="zero" VALUE=" 0 " onClick="digitpress(0)">
<td><INPUT TYPE="button" NAME="dot" VALUE=" . " onClick="digitpress('.'+ ')">
<TD><input type="button" name="equal" value=" = " onClick="pushop('=')">
<td><input type="button" name="divide" value=" / " onClick="pushop('/')">
<td></td>
</TABLE>
</FORM>
</body>
</html>
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