const readline = require(‘readline-sync‘);
//学生信息
let users = [{
???????id: 1,
???????name: ‘liu‘,
???????age: ‘17‘,
???????gender: ‘male‘,
???????score: ‘98‘
???},
???{
???????id: 2,
???????name: ‘dog‘,
???????age: ‘18‘,
???????gender: ‘male‘,
???????score: ‘81‘
???},
???{
???????id: 3,
???????name: ‘xingxing‘,
???????age: ‘20‘,
???????gender: ‘male‘,
???????score: ‘79‘
???},
???{
???????id: 4,
???????name: ‘coco‘,
???????age: ‘16‘,
???????gender: ‘female‘,
???????score: ‘73‘
???},
???{
???????id: 5,
???????name: ‘along‘,
???????age: ‘15‘,
???????gender: ‘female‘,
???????score: ‘66‘
???}
];
//账号密码
let admin = [{
???username: ‘1‘,
???password: ‘1‘
}]
//登录
function islogin(admin) {
???let num = 3;
???while (true) {
???????console.log(‘请输入帐号：‘);
???????let username = readline.question();
???????console.log(‘请输入密码：‘);
???????let password = readline.question();
???????for (let i = 0; i < admin.length; i++) {
???????????if (admin[i].username == username && admin[i].password == password) {
???????????????console.log(‘登录成功‘);
???????????????noteMenu();
???????????????return;
???????????}
???????}
???????num--;
???????if (num <= 0) {
???????????console.log(‘错误3次，锁卡‘);
???????????return num;
???????} else
???????????console.log(`登录失败,你还有${num}次机会,请重新输入`);
???}
}
//注册
function isregister(admin) {
???while (true) {
???????console.log(‘请输入帐号：‘);
???????let username = readline.question();
???????console.log(‘请输入密码：‘);
???????let password = readline.question();
???????let isOk = false;
???????for (let i = 0; i < admin.length; i++) {
???????????if (admin[i].username == username) {
???????????????console.log(‘用户名已注册，请重新输入‘);
???????????????isOk = true;
???????????????break;
???????????}
???????}
???????if (!isOk) {
???????????admin.push({
???????????????username,
???????????????password,
???????????});
???????????console.log(‘注册成功‘)
???????????menu(admin);
???????????return;
???????}
???}
}
//主菜单
function menu(admin) {
???while (true) {
???????console.log(‘1.登录 ???2.注册 ???3.切换用户‘)
???????console.log(‘请选择要进行的操作：‘)
???????let option = readline.question() - 0;
???????switch (option) {
???????????case 1:
???????????????let num = islogin(admin);
???????????????if (num <= 0) {
???????????????????return;
???????????????}
???????????????break;
???????????case 2:
???????????????isregister(admin);
???????????????break;
???????????case 3:
???????????????islogin(admin);
???????????????break;
???????????default:
???????????????console.log(‘请输入正确选项‘);
???????}
???}
}
//操作菜单
function noteMenu() {
???while (true) {
???????console.log(‘请选择操作：1.查询 ???2.新增 ???3.修改 ???4.删除 ???5.退出‘)
???????let option = readline.question() - 0;
???????switch (option) {
???????????case 1:
???????????????find();
???????????????break;
???????????case 2:
???????????????addUsers();
???????????????break;
???????????case 3:
???????????????change();
???????????????break;
???????????case 4:
???????????????deletSth();
???????????????break;
???????????case 5:
???????????????return;
???????????default:
???????????????console.log(‘请输入正确的选项‘);
???????}
???}
}
//查询
function find() {
???console.log(‘请输入查询方式: 1.查询所有 ???2.分类查询‘);
???let option = readline.question() - 0;
???switch (option) {
???????case 1:
???????????findAll();
???????????break;
???????case 2:
???????????splitClass();
???????????break;
???????default:
???????????console.log(‘请输入正确的选项‘);
???}
}
//查询所有
function findAll() {
???for (let i = 0; i < users.length; i++) {
???????console.log(users[i]);
???}
}
//分类查询
function splitClass() {
???console.log(‘请选择操作：1.姓名 ???2.年龄 ???3.性别 ???4.分数‘);
???let option = readline.question() - 0;
???switch (option) {
???????case 1:
???????????allName();
???????????break;
???????case 2:
???????????userAge();
???????????break;
???????case 3:
???????????sex();
???????????break;
???????case 4:
???????????scoreAll();
???????????break;
???????default:
???????????console.log(‘请输入正确的选项‘);
???}
}
//姓名查询
function allName() {
???console.log(‘请输入要查询的名字‘);
???let name = readline.question();
???let isOk = false;
???for (let i = 0; i < users.length; i++) {
???????if ((users[i].name).includes(name)) {
???????????console.log(users[i]);
???????????isOk = true;
???????}
???}
???if (!isOk) {
???????console.log(‘没有找到该学生‘);
???}
}
//年龄查询
function userAge() {
???while (true) {
???????console.log(‘请输入要查询的年龄‘);
???????let age = readline.question();
???????let reg = /^\d{1,3}$/;
???????let isOk = false;
???????if (reg.test(age) == true) {
???????????for (let i = 0; i < users.length; i++) {
???????????????if ((users[i].age).includes(age)) {
???????????????????console.log(users[i]);
???????????????????isOk = true;
???????????????}
???????????}
???????????if (!isOk) {
???????????????console.log(‘没有找到包含该年龄的学生‘);
???????????????return;
???????????} else
???????????????return;
???????} else {
???????????console.log(‘错误，请输入正确的年龄‘);
???????}
???}
}
//性别查询
function sex() {
???console.log(‘请选择要查询的性别: 1.男 ?2.女‘);
???let sel = readline.question() - 0;
???let man = /^male$/,
???????woman = /^female$/;
???switch (sel) {
???????case 1:
???????????sexsel(man);
???????????break;
???????case 2:
???????????sexsel(woman);
???????????break;
???}
}
//性别筛选
function sexsel(sex) {
???for (let i = 0; i < users.length; i++) {
???????if (sex.test(users[i].gender)) {
???????????console.log(users[i]);
???????}
???}
}
//分数查询
function scoreAll() {
???console.log(‘请输入要查询的分数‘);
???let score = readline.question();
???let isOk = false;
???for (let i = 0; i < users.length; i++) {
???????if ((users[i].score).includes(score)) {
???????????console.log(users[i]);
???????????isOk = true;
???????}
???}
???if (!isOk) {
???????console.log(‘没有找到包含该成绩的学生‘);
???}
}
//新增
function addUsers() {
???while (true) {
???????console.log(‘请输入新增学生姓名:‘);
???????let name = readline.question();
???????console.log(‘请输入新增学生年龄:‘);
???????let age = readline.question();
???????console.log(‘请输入新增学生性别:‘);
???????let gender = readline.question();
???????console.log(‘请输入新增学生分数:‘);
???????let score = readline.question();
???????let regName = /^[a-zA-Z]+$/; //限制名字只能由字母组成
???????let regAge = /^\d{1,2}$/; //限制年龄只能由数字组成
???????let regGender = /^female|male$/; //限制性别只能由male和female组成
???????let regScore = /^((\d{1,2})|(1[0-4]\d)|(150))$/; //限制成绩只能0-150
???????if (regName.test(name)) {
???????????if (regAge.test(age)) {
???????????????if (regGender.test(gender)) {
???????????????????if (regScore.test(score)) {
???????????????????????users.push({
???????????????????????????id: `${users.length+1}`,
???????????????????????????name,
???????????????????????????age,
???????????????????????????gender,
???????????????????????????score
???????????????????????})
???????????????????????console.log(‘添加成功，该学生信息如下:‘);
???????????????????????console.log(users.pop());
???????????????????????return;
???????????????????} else
???????????????????????console.log(‘成绩只能在0-150,请重新输入‘);
???????????????} else
???????????????????console.log(‘性别只能是male或female,请重新输入‘);
???????????} else
???????????????console.log(‘年龄只能由数字组成,请重新输入‘);
???????} else
???????????console.log(‘名字只能由字母组成,请重新输入‘);
???}
}
//修改
function change() {
???console.log(‘请输入要修改的学生学号：‘);
???let stuNum = readline.question() - 0;
???for (let i = 0; i < users.length; i++) {
???????if (users[i].id === stuNum) {
???????????console.log(‘当前学生信息如下：‘);
???????????console.log(users[i]);
???????????changeAll(i);
???????????return;
???????}
???}
???console.log(‘没有该学号的学生‘);
}
//修改主菜单
function changeAll(i) {
???console.log(‘请选择要修改的信息：1.姓名 ???2.年龄 ???3.性别 ???4.成绩‘);
???let option = readline.question() - 0;
???switch (option) {
???????case 1:
???????????stuName(i);
???????????break;
???????case 2:
???????????stuAge(i);
???????????break;
???????case 3:
???????????stuSex(i);
???????????break;
???????case 4:
???????????stuScore(i);
???????????break;
???????default:
???????????console.log(‘请输入正确的选项‘);
???}
}
//修改姓名
function stuName(i) {
???while (true) {
???????console.log(‘请输入要修改的姓名：‘);
???????let name = readline.question();
???????let reg = /^[a-zA-Z]+$/;
???????if (reg.test(name) == true) {
???????????users[i].name = name;
???????????console.log(‘修改成功！该学生信息如下：‘);
???????????console.log(users[i]);
???????????return;
???????} else
???????????console.log(‘请输入正确的名字(字母)‘);
???}
}
//修改年龄
function stuAge(i) {
???while (true) {
???????console.log(‘请输入要修改的年龄：‘);
???????let age = readline.question();
???????let reg = /^\d{1,2}$/;
???????if (reg.test(age) == true) {
???????????users[i].age = age;
???????????console.log(‘修改成功！该学生信息如下：‘);
???????????console.log(users[i]);
???????????return;
???????} else
???????????console.log(‘请输入正确的年龄数字(1-2位数)‘);
???}
}
//修改性别
function stuSex(i) {
???while (true) {
???????console.log(‘请输入要修改的性别：‘);
???????let gender = readline.question();
???????let reg = /^female|male$/;
???????if (reg.test(gender) == true) {
???????????users[i].gender = gender;
???????????console.log(‘修改成功！该学生信息如下：‘);
???????????console.log(users[i]);
???????????return;
???????} else
???????????console.log(‘请输入正确的性别(male或famel)‘);
???}
}
//修改成绩
function stuScore(i) {
???while (true) {
???????console.log(‘请输入要修改的成绩：‘);
???????let score = readline.question();
???????let reg = /^((\d{1,2})|(1[0-4]\d)|(150))$/;
???????if (reg.test(score) == true) {
???????????users[i].score = score;
???????????console.log(‘修改成功！该学生信息如下：‘);
???????????console.log(users[i]);
???????????return;
???????} else
???????????console.log(‘请输入正确的成绩(0-150)‘);
???}
}
//删除
function deletSth() {
???while (true) {
???????console.log(‘请输入要删除的学生学号：‘);
???????let stuNum = readline.question() - 0;
???????let reg = /^\d+$/;
???????if (reg.test(stuNum) == true) {
???????????for (let i = 0; i < users.length; i++) {
???????????????if (users[i].id === stuNum) {
???????????????????console.log(‘当前学生信息如下：‘);
???????????????????console.log(users[i]);
???????????????????deletMenu(i);
???????????????????return;
???????????????}
???????????}
???????????console.log(‘没有找到该学号学生‘);
???????} else
???????????console.log(‘请输入正确的学号(数字)‘);
???}
}
//删除主菜单
function deletMenu(i) {
???console.log(‘是否确定删除:‘);
???console.log(‘1.是 ???2.否‘);
???let option = readline.question() - 0;
???switch (option) {
???????case 1:
???????????deletTrue(i);
???????????break;
???????case 2:
???????????return;
???}
}
//确定删除
function deletTrue(i) {
???users.splice(i, 1);
???console.log(‘删除成功!‘);
}
menu(admin);
node.js运行简易学生信息管理系统
原文地址：https://www.cnblogs.com/liuwujiang/p/9097870.html