使用流程控制语句写 ATM

使用流程控制语句写   ATM    

let username = "z",   password = "1",   account = 10000,   isLogin = false;

while (!isLogin) {   let usernameInput = window.prompt("请输入用户名:");   let passwordInput = window.prompt("请输入密码:");

console.log(usernameInput, passwordInput)

if (usernameInput === username && password === passwordInput) {      let flag = true;      while (flag) {         let option = ~~window.prompt("选择操作类型: 1. 查询 2. 存款 3. 取款 4. 修改密码 5. 退出 6. 退出登录");         switch (option) {            case 1:               console.log("你的余额为: " + account);               break;            case 2:               {                  let money = ~~window.prompt("输入存款金额: ");                  account += money;               }               break;            case 3:               {                  let money = ~~window.prompt("输入取款金额: ");                  account -= money;               }               break;            case 4:               password = window.prompt("输入新密码: ");               break;            case 5:               flag = false;               console.log("退出");               break;            case 6:               flag = false;               isLogin = true;         }      }   }}