<html>
<head>
<title>Калькулятор</title>
</head>
<script language="JavaScript">
<!--
// deklaracja zmiennych
var wynik=0, op=0, nowe=0, nowe2=0, done=1, oset=0, kropka, temp;
function reset(value)
{
document.form1.ekran.value = value;
wynik = 0,
op = 0,
nowe = 0,
nowe2 = 0;
done = 1;
oset = 0;
}
function wspolna(new_temp)
{
kropka = 1;
if(nowe || done) {
nowe = 0;
done = 0;
temp = new_temp;
}
for(var i=0; i<temp.length; i++) if (temp[i]=='.') kropka=0;
}
function button(ktory,ktory2)
{
temp = document.form1.ekran.value;
if(ktory2=='.') {
wspolna('0');
if(kropka) {
temp += ktory2;
document.form1.ekran.value = temp;
oset = 0;
}
}
if(ktory>=0 && ktory<=9) {
wspolna('');
if(temp==0 && kropka==1) temp='';
temp += ktory;
document.form1.ekran.value = temp;
oset = 1;
}
if(ktory2=='-' || ktory2=='+' || ktory2=='/' || ktory2=='*') {
if(nowe) op = ktory2
else {
if(!nowe2) {
op = ktory2;
wynik = temp;
nowe2=1;
}
else {
wynik = eval(wynik + op + temp);
op = ktory2;
document.form1.ekran.value = wynik;
}
oset=0;
nowe = 1;
}
}
if(ktory2=='1/x' ) { wynik = eval(1 / temp) ; reset(wynik); }
if(ktory2=='sqrt') { wynik = Math.sqrt(temp); reset(wynik); }
if(ktory2=='exp' ) { wynik = Math.exp(temp) ; reset(wynik); }
if(ktory2=='+/-') document.form1.ekran.value = eval(-temp);
if(ktory2=='=' && oset && op!='0') reset(eval(wynik + op + temp));
if (ktory2=='C') reset(0);
if(document.form1.ekran.value[0] == '.')
document.form1.ekran.value = '0' + document.form1.ekran.value;
}
//-->
</script>
<body>
<center>
<form name="form1">
<table bgColor="#430086">
<tbody>
<tr><td><table bgColor="#430086" border="1" cellPadding="0" cellSpacing="5">
<tbody>
<tr align="middle">
<td colSpan="5"><input name="ekran" value="0" size="20"></td></tr>
<tr align="middle">
<td colSpan="4"><b><font color="#FFFF00">Калькулятор</font></b></td>
<td><input name="C" onclick="button(11,'C')" type="button" value=" C "></td></tr>
<tr align="middle">
<td><input name="7" onclick="button(7 ,'')" type="button" value=" 7 "></td>
<td><input name="8" onclick="button(8 ,'')" type="button" value=" 8 "></td>
<td><input name="9" onclick="button(9 ,'')" type="button" value=" 9 "></td>
<td><input name="/" onclick="button(11,'/')" type="button" value=" / "></td>
<td><input name="sqrt" onclick="button(11,'sqrt')" type="button" value="sqrt"></td></tr>
<tr align="middle">
<td><input name="4" onclick="button(4,'')" type="button" value=" 4 "></td>
<td><input name="5" onclick="button(5,'')" type="button" value=" 5 "></td>
<td><input name="6" onclick="button(6,'')" type="button" value=" 6 "></td>
<td><input name="*" onclick="button(11,'*')" type="button" value=" * "></td>
<td><input name="exp" onclick="button(11,'exp')" type="button" value="exp"></td></tr>
<tr align="middle">
<td><input name="1" onclick="button(1,'')" type="button" value=" 1 "></td>
<td><input name="2" onclick="button(2,'')" type="button" value=" 2 "></td>
<td><input name="3" onclick="button(3,'')" type="button" value=" 3 "></td>
<td><input name="-" onclick="button(11,'-')" type="button" value=" - "></td>
<td><input name="1/x" onclick="button(11,'1/x')" type="button" value="1/x "></td></tr>
<tr align="middle">
<td><input name="0" onclick="button(0,'')" type="button" value=" 0 "></td>
<td><input name="+/-" onclick="button(11,'+/-')" type="button" value=" +/- "></td>
<td><input name="." onclick="button(11,'.')" type="button" value=" , "></td>
<td><input name="+" onclick="button(11,'+')" type="button" value=" + "></td>
<td><input name="=" onclick="button(11,'=')" type="button" value=" = "></td>
</tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</center>
</form>
</body>
</html>
