<!doctype html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <title>Document</title> </head> <body> <script> var num=parseInt(37*Math.random()) ; var time=1; var arr=[]; for (j=0;j<3;j++) { for (i = 1; i <= 4; i++) { arr[i - 1] = prompt("请输入第" + i + "个四个数 "); if (arr[i - 1] <= 9 && arr[i - 1] >= 0&&arr[i-1]!="") { } else { alert("请输入正确的数字"); arr[i - 1] = prompt("请输入第" + i + "个四个数 "); i--; } } x = parseInt(arr[0]) + parseInt(arr[1]) + parseInt(arr[2]) + parseInt(arr[3]); alert(x); if (x!== num) { if (time == 3) { alert("很遗憾 你失败了") } else { alert("请再来一次"); } time++; } else { alert("恭喜你 成功了"); break } } document.write(num) </script> </body> </html>
