JS基础，课堂作业，三个数字排序

三个数字大小排序

 <script>
     var a = parseInt(prompt("请输入第一个整数："));
     var b = parseInt(prompt("请输入第二个整数："));
     var c = parseInt(prompt("请输入第三个整数："));
     if(a > b && a > c && b > c) {

         alert(c + "<" + b + "<" + a);

     } else if(a > b && a > c && b < c) {
         alert(b + "<" + c + "<" + a);

     } else if(b > a && b > c && a > c) {
         alert(c + "<" + a + "<" + b);

     } else if(b > c && b > a && c > a) {
         alert(a + "<" + c + "<" + b);

     } else if(c > a && c > b && a > b) {
         alert(b + "<" + a + "<" + c);

     } else if(c > b && c > a && b > a) {
         alert(a + "<" + b + "<" + c);

     } else {
         alert("请输入有效字符！！！");
     }

 </script>