用函数实现建议atm功能

const rs = require("readline-sync")

// atm数据

let user = [{

    name: "1",

    PWD: "1",

    balance: 1000

}, {

    name: "2",

    PWD: "2",

    balance: 2000

}, {

    name: "3",

    PWD: "3",

    balance: 3000

}];

// 登录

function dl() {

    let count = 3;

    let login = false;

    let index = 0;

    while (count) {

        console.log("输入账号");

        inputName = rs.question();

        for (let i = 0; i < user.length; i++) {

            if (inputName == user[i].name) { //账号是否存在

                console.log("输入密码");

                let inputPWD = rs.question();

                if (inputPWD == user[i].PWD) { //判断密码是否正确

                    login = true; //登录成功

                    index = i;

                    return [login, index];

                } else if (count == 1) {

                    console.log(`密码输入错误,您的3次机会已经用完，账号冻结！`);

                    count = 0;

                    break;

                } else {

                    console.log(`密码输入错误，请重新输入，您还有${--count}次机会！`);

                    break;

                }

            } else if (i == user.length - 1 && count > 1) { // 判断是否找到最后的数据

                console.log(`账号输入错误，请重新输入，您还有${--count}次机会！`);

            } else if (i == user.length - 1 && count == 1) {

                console.log(`账号输入错误,您的3次机会已经用完，账号冻结！`);

                count = 0;

                break;

            }

        }

    }

    return false;

}

// 查询

function look(index) {

    console.log(`您的余额为${user[index].balance}`);

    return

}

// 主体

function main() {

    let arr = dl();

    if (arr[0]) { // 判断登录是否成功

        let index = arr[1];

        let yes = false;

        while (!yes) {

            console.log("1.查询,2.存钱,3取钱,4.转账,0.退出");

            let num = rs.question() - 0;

            switch (num) {

                case 1:

                    look(index);

                    break;

                case 2:

                    saveMoney(index);

                    break;

                case 3:

                    getMoney(index);

                    break;

                case 4:

                    zhuanZhang(index);

                    break;

                case 0:

                    console.log("谢谢惠顾");

                    return

            }

        }

    }

}

main();

// 存钱、

function saveMoney(index) {

    console.log("请输入存款金额");

    let saveMoney = rs.question() - 0;

    if (!isNaN(saveMoney) && saveMoney % 100 == 0) {

        user[index].balance += saveMoney;

        console.log(`存款成功你的余额现在为${user[index].balance}`);

    } else {

        console.log("请输入纯数字并且金额100的倍数");

    }

}

// 取钱

function getMoney(index) {

    console.log("请输入取款金额");

    let getMoney = rs.question() - 0;

    if (getMoney <= user[index].balance && getMoney % 100 == 0) {

        user[index].balance -= getMoney;

        console.log(`取款成功你的余额现在为${user[index].balance}`);

    } else {

        console.log("余额不足");

    }

}

// // 转账

function zhuanZhang(index) {

    console.log(`请输入转账账号：`);

    let transName = rs.question()

    if (transName != user[index].name) {

        console.log(`请输入转账金额：`);

        let transMoney = rs.question() - 0;

        if (!isNaN(transMoney)) { // 判断是不是纯数字

            if (transMoney <= user[index].balance) {

                //当前账号减钱

                user[index].balance -= transMoney;

                //转帐账号加钱

                user[transIndex].balance += transMoney;

                console.log(`转帐成功！余额还剩${user[index].balance}转账账户余额${ user[transIndex].balance += transMoney}`);

            } else {

                console.log(`余额不足！！`);

            }

        }

    } else {

        console.log(`不能给自己转账`);

    }

}