练习题1
<html lang="en">
<head>
<meta charset="UTF-8">
<title>小明</title>
<script type="text/javascript">
var score = prompt('请输入小明的期末成绩(0-100):');
if (score == 100){
alert('BMW');
}else if (score >=80 && score <=99){
alert('iphone15s');
}else if (score >=60 && score < 80){
alert('参考书');
}else {
alert('啥也没有')
}
</script>
</head>
<body>
</body>
</html>
练习题2
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>嫁女儿</title>
<script type="text/javascript">
var H = 180, M = 10000000, F = 500;
if (H >= 180 && M >= 10000000 && F >= 500){
alert('我一定要嫁给他');
}else if (H >= 180 || M >= 10000000 || F >= 500){
alert('嫁吧,比上不足,比下有余');
}else {
alert('不嫁');
}
</script>
</head>
<body>
</body>
</html>
练习题3
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>排序</title>
<script type="text/javascript">
var num1 = prompt('请输入一个整数');
var num2 = prompt('请输入一个整数');
var num3 = prompt('请输入一个整数');
var a;
if (num1 > num2 && num2 > num3){
a = String(num3) + num2 + num1;
alert(a);
}else if (num1 < num2 && num2 < num3){
a = String(num1) + num2 + num3;
alert(a);
}else if(num1 < num2 && num2 > num3 && num1 > num3){
a = String(num3) + num1 + num2;
alert(a);
}else if(num1 < num2 && num2 > num3 && num1 < num3){
a = String(num1) + num3 + num2;
alert(a);
}else if(num1 > num2 && num2 < num3 && num1 > num3){
a = String(num2) + num3 + num1;
alert(a);
}else if(num1 > num2 && num2 < num3 && num1 < num3) {
a = String(num2) + num1 + num3;
alert(a);
}
</script>
</head>
<body>
</body>
</html>
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