JavaScript: Code tạo chương trình máy tính điện tử


<html>
<head><script LANGUAGE="JavaScript">
function a_plus_b(form) {
            a=eval(form.a.value)
            b=eval(form.b.value)
            c=a+b
            form.ans.value = c
}
function a_minus_b(form) {
            a=eval(form.a.value)
            b=eval(form.b.value)
            c=a-b
            form.ans.value=c
}
function a_times_b(form) {
            a=eval(form.a.value)
            b=eval(form.b.value)
            c=a*b
            form.ans.value=c
}
function a_div_b(form) {
            a=eval(form.a.value)
            b=eval(form.b.value)
            c=a/b
            form.ans.value = c
}
function a_pow_b(form) {
            a=eval(form.a.value)
            b=eval(form.b.value)
            c=Math.pow(a, b)
            form.ans.value = c
}
</script>
<title>May tinh don gian</title>
</head>
<body>
<form name="formx">
<p><input type="text" size="4" value="12" name="a">
<input type="button" value="  + " onClick="a_plus_b(this.form)">
<input type="button" value="  -  " onClick="a_minus_b(this.form)">
<input type="button" value="  x  " onClick="a_times_b(this.form)">
<input type="button" value="/  " onClick="a_div_b(this.form)">
<input type="button" value="  ^  " onClick="a_pow_b(this.form)">
<input type="number" size="4" value="3" name="b"> =
<input type "number" value="0" name="ans" size="9"> </p>
</form>
</body>
</html>
Tags: Lập trình, JavaScript, máy tính điện tử

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