let readline = require("readline-sync"); // 引入输入模块
// 清屏函数
let clear = () => process.stdout.write(process.platform === ‘win32‘ ? ‘\x1Bc‘ : ‘\x1B[2J\x1B[3J\x1B[H‘);
// 管理员信息
let adminInfo = [
{ "adminID": "dengfeng", "adminPWD": "123" },
{ "adminID": "liangdaye", "adminPWD": "321" }
];
// 初始化3个班级的学生信息 使用2维数组来存储
let stuInfo = [
[
{ "stuID": "1", "stuName": "bdy", "stuAge": "18", "stuGender": "male", "stuScore": "100", "className": "1班" },
{ "stuID": "2", "stuName": "luc", "stuAge": "23", "stuGender": "female", "stuScore": "89", "className": "1班" },
{ "stuID": "3", "stuName": "lc", "stuAge": "17", "stuGender": "male", "stuScore": "93", "className": "1班" },
{ "stuID": "4", "stuName": "xu", "stuAge": "19", "stuGender": "female", "stuScore": "91", "className": "1班" },
{ "stuID": "5", "stuName": "chao", "stuAge": "20", "stuGender": "male", "stuScore": "95", "className": "1班" }
],
[
{ "stuID": "1", "stuName": "wf", "stuAge": "18", "stuGender": "female", "stuScore": "85", "className": "2班" },
{ "stuID": "2", "stuName": "xtf", "stuAge": "19", "stuGender": "female", "stuScore": "91", "className": "2班" },
{ "stuID": "3", "stuName": "xj", "stuAge": "19", "stuGender": "male", "stuScore": "92", "className": "2班" },
{ "stuID": "4", "stuName": "ls", "stuAge": "21", "stuGender": "male", "stuScore": "94", "className": "2班" },
{ "stuID": "5", "stuName": "xjs", "stuAge": "22", "stuGender": "female", "stuScore": "89", "className": "2班" }
],
[
{ "stuID": "1", "stuName": "yaj", "stuAge": "22", "stuGender": "male", "stuScore": "86", "className": "3班" },
{ "stuID": "2", "stuName": "xj", "stuAge": "25", "stuGender": "female", "stuScore": "89", "className": "3班" },
{ "stuID": "3", "stuName": "xiz", "stuAge": "24", "stuGender": "female", "stuScore": "80", "className": "3班" },
{ "stuID": "4", "stuName": "yhq", "stuAge": "26", "stuGender": "female", "stuScore": "92", "className": "3班" },
{ "stuID": "5", "stuName": "npa", "stuAge": "19", "stuGender": "male", "stuScore": "96", "className": "3班" }
]
];
// 管理员登录验证函数 账号密码能匹配上返回true 不能匹配上返回false
let adminLogin = function (adminID, adminPWD) {
for (let i = 0; i < adminInfo.length; i++) {
if (adminID === adminInfo[i].adminID && adminPWD === adminInfo[i].adminPWD) {
return true;
}
}
return false;
}
// 班级选择函数 用于打印出用户可选的班级 返回一个字符串
let classSelect = function () {
let str = "";
// 使用for循环拼接出所有的班级，例如：1.第1班 2.第2班 3.第3班 4.返回
for (let i = 0; i < stuInfo.length; i++) {
if (stuInfo[i] !== null) {
str += (i + 1) + "." + "第" + (i + 1) + "班 ";
}
}
return "请选择班级：" + str + (stuInfo.length + 1) + ".返回";
}
// 班级确认函数 用于确认用户输入的班级是否正确
let classCheck = function (classNo) {
for (let i = 0; i < stuInfo.length; i++) {
if (classNo === (i + 1) && stuInfo[i] !== null) {
return true;
}
}
return false;
}
// 班级查询函数 接收一个参数 用户想要查询的班级编号 打印出该班级所有学生的信息
let classQuery = function (classNo) {
clear();
console.log("班级信息如下：");
console.log("班级 学号 姓名 年龄 性别 分数");
let str = "";// 声明一个空字符串用于拼接班级里面的学生信息
for (let i = 0; i < stuInfo[classNo - 1].length; i++) {
str += stuInfo[classNo - 1][i].className + "\t" + stuInfo[classNo - 1][i].stuID + "\t" + stuInfo[classNo - 1][i].stuName + "\t" + stuInfo[classNo - 1][i].stuAge + "\t" + stuInfo[classNo - 1][i].stuGender + "\t" + stuInfo[classNo - 1][i].stuScore;
console.log(str); // 拼接好一行就打印一行
str = "";// 清空字符串 以便下一次拼接
}
}
// 学生查询函数 接收一个参数 学生姓名(字符串) 打印出该姓名的所有学生
let stuQuery = function (stuName) {
let num = 0;
let str = "";// 声明一个空字符串用于拼接班级里面的学生信息
for (let i = 0; i < stuInfo.length; i++) {
for (let j = 0; j < stuInfo[i].length; j++) {
if (stuName === stuInfo[i][j].stuName) {
num++;
if (num === 1) {
console.log("找到该姓名学生，该学生具体信息如下：");
console.log("班级 学号 姓名 年龄 性别 分数");
}
str += stuInfo[i][j].className + "\t" + stuInfo[i][j].stuID + "\t" + stuInfo[i][j].stuName + "\t" + stuInfo[i][j].stuAge + "\t" + stuInfo[i][j].stuGender + "\t" + stuInfo[i][j].stuScore;
console.log(str);
str = "";
}
}
}
if (num === 0) {
console.log("对不起，没有找到该学生");
}
}
// 学生确认函数 接收两个参数 班级编号和学生学号 确认该学生是否存在
let stuCheck = function (classNo, stuNo) {
for (let i = 0; i < stuInfo[classNo - 1].length; i++) {
if (stuNo === stuInfo[classNo - 1][i].stuID) {
return stuInfo[classNo - 1][i];// 返回该学生的具体信息
}
}
return false;
}
// 学生信息修改函数 接收两个参数 学生对象和修改选项
let editInfo = function (singleStuInfo, editSelect) {
switch (editSelect) {
//修改姓名
case 1:
{
console.log("请输入修改后的学生姓名：");
let newStuName = readline.question("");
singleStuInfo.stuName = newStuName;
console.log("修改成功，按回车键返回");
}
break;
//修改年龄
case 2:
{
console.log("请输入修改后的学生年龄：");
let newStuAge = readline.question("");
singleStuInfo.stuAge = newStuAge;
console.log("修改成功，按回车键返回");
}
break;
//修改性别
case 3:
{
let editGender = true;
let str = "";
while (editGender) {
clear();
str = "";
console.log("当前该学生信息为：");
console.log("班级 学号 姓名 年龄 性别 分数");
str += singleStuInfo.className + "\t" + singleStuInfo.stuID + "\t" + singleStuInfo.stuName + "\t" + singleStuInfo.stuAge + "\t" + singleStuInfo.stuGender + "\t" + singleStuInfo.stuScore;
console.log(str);
console.log("请选择您要进行修改的学生信息： 1.姓名 2.年龄 3.性别 4.分数 5.返回");
console.log("请选择学生的性别： 1.男 2.女");
let newStuGender = parseInt(readline.question(""));
switch (newStuGender) {
case 1:
singleStuInfo.stuGender = "male";
editGender = false;
console.log("修改成功，按回车键返回");
break;
case 2:
singleStuInfo.stuGender = "female";
editGender = false;
console.log("修改成功，按回车键返回");
break;
default:
console.log("输入有误，请重新输入");
console.log("按回车键继续");
readline.question("");
}
}
}
break;
//修改分数
case 4:
{
console.log("请输入修改后的学生分数：");
let newStuScore = readline.question("");
singleStuInfo.stuScore = newStuScore;
console.log("修改成功，按回车键返回");
}
break;
default:
console.log("选择有误，请重新选择");
break;
}
readline.question("");
}
// 添加学生信息函数 接收5个参数 班级编号，学生姓名，年龄，性别，分数
let addStu = function (classNo, addStuName, addStuAge, addStuGender, addStuScore) {
for (let i = 0; i < stuInfo.length; i++) {
if (classNo === (i + 1)) {
let length = stuInfo[i].length;
stuInfo[i][length] = {};
stuInfo[i][length].stuID = length + 1 + "";
stuInfo[i][length].stuName = addStuName;
stuInfo[i][length].stuAge = addStuAge;
addStuGender === 1 ? stuInfo[i][length].stuGender = "male" : stuInfo[i][length].stuGender = "female";
stuInfo[i][length].stuScore = addStuScore;
stuInfo[i][length].className = classNo + "班";
console.log("新增学生成功！");
}
}
}
// 删除班级函数 接收一个参数 要删除的班级的编号
let delClass = function (classNo) {
while (true) {
clear();
console.log(classNo + "班");
let str = "";
for (let i = 0; i < stuInfo[classNo - 1].length; i++) {
str += stuInfo[classNo - 1][i].className + "\t" + stuInfo[classNo - 1][i].stuID + "\t" + stuInfo[classNo - 1][i].stuName + "\t" + stuInfo[classNo - 1][i].stuAge + "\t" + stuInfo[classNo - 1][i].stuGender + "\t" + stuInfo[classNo - 1][i].stuScore;
console.log(str); // 拼接好一行就打印一行
str = "";// 清空字符串 以便下一次拼接
}
console.log("是否确认删除此班级？(Y/N)");
let isDel = readline.question("");
switch (isDel) {
case "Y":
case "y":
stuInfo[classNo - 1] = null;
console.log("删除班级成功，按回车键返回");
readline.question("");
return;
case "N":
case "n":
return;
default:
console.log("输入有误，请重新输入！");
readline.question("");
}
}
}
// 删除学生函数 接收2个参数 所要删除的学生所在班级编号以及该学生对象
let delStu = function (classNo, stu, func) {
let str = "";
for (let i = 0; i < stuInfo[classNo - 1].length; i++) {
if (stu.stuID === stuInfo[classNo - 1][i].stuID) {
if (func === "del") {
while (true) {
clear();
str = "";
console.log("你要删除的学生信息为：");
console.log("班级 学号 姓名 年龄 性别 分数");
str += stuInfo[classNo - 1][i].className + "\t" + stuInfo[classNo - 1][i].stuID + "\t" + stuInfo[classNo - 1][i].stuName + "\t" + stuInfo[classNo - 1][i].stuAge + "\t" + stuInfo[classNo - 1][i].stuGender + "\t" + stuInfo[classNo - 1][i].stuScore;
console.log(str);
console.log("是否确认删除？(Y/N)");
let isDel = readline.question("");
switch (isDel) {
case "Y":
case "y":
stuInfo[classNo - 1].splice(i, 1);
console.log("删除学生成功，按回车键返回");
readline.question("");
return;
case "N":
case "n":
return;
default:
console.log("输入有误，请重新输入，按回车键继续");
readline.question("");
}
}
}
else {
stuInfo[classNo - 1].splice(i, 1);
}
}
}
}
// 转班函数 接收3个参数 原本的班级编号 学生对象 要去的班级编号
let classTransfer = function (classNo, singleStuInfo, classNo2) {
delStu(classNo, singleStuInfo, "trans");
let length = stuInfo[classNo2 - 1].length;
if (length === 0) {
singleStuInfo.stuID = length + 1 + "";
}
else {
singleStuInfo.stuID = (parseInt(stuInfo[classNo2 - 1][length - 1].stuID) + 1) + "";
}
singleStuInfo.className = classNo2 + "班";
stuInfo[classNo2 - 1][length] = singleStuInfo;
}
let main = function () {
let loginChance = 3; // 登录机会初始化为3次
while (loginChance) // 只要登录机会不为0 就可以进入系统
{
clear();
console.log("请输入您的账号：");
let adminID = readline.question("");
console.log("请输入您的密码：");
let adminPWD = readline.question("");
if (adminLogin(adminID, adminPWD)) // 如果管理员身份验证通过 就进入if
{
let useSys = true;// 设置使用系统的标识 useSys的值为true
while (useSys) {
clear();
console.log("欢迎使用学生管理系统");
console.log("请选择您要执行的功能：1.查询 2.修改 3.增加 4.删除 5.转班 6.退出");
let funcSelect = parseInt(readline.question(""));
switch (funcSelect) {
// 查询功能
case 1:
let query = true;// 设置查询的标识 query的值为true
while (query) {
clear()
console.log("请选择您要进行的查询：1.班级查询 2.学生查询 3.返回");
let querySelect = parseInt(readline.question(""));
switch (querySelect) {
// 班级查询
case 1:
{
clear();
let str = "";// 声明一个临时字符串用于拼接提示信息
let classSelectStr = classSelect();
while (true) {
clear();
console.log(classSelectStr);
let classNo = parseInt(readline.question(""));
if (classCheck(classNo)) {
classQuery(classNo);
}
else {
if (classNo === stuInfo.length + 1) {
break;
}
else {
console.log("输入有误，请重新输入");
}
}
console.log("按回车键返回");
readline.question("");
}
break;
}
// 学生查询
case 2:
{
clear();
console.log("请输入您要查询的学生的姓名：");
let stuName = readline.question("");
stuQuery(stuName);
console.log("按回车键返回");
readline.question("");
break;
}
case 3:
query = false;// 设置查询的标识 query的值为false
break;
default:
console.log("输入有误，请重新输入！(按回车键继续)");
readline.question("");
}
}
break;
// 修改功能
case 2:
{
let editChoose = true;
while (editChoose) {
clear();
let str = "";
let classSelectStr = classSelect();
console.log(classSelectStr);
let classNo = parseInt(readline.question(""));
if (classCheck(classNo)) {
clear();
console.log("请输入您要修改的学生的学号：");
let stuNo = readline.question("");
let singleStuInfo = stuCheck(classNo, stuNo);
if (singleStuInfo) {
while (true) {
clear();
str = "";
console.log("当前该学生信息为：");
console.log("班级 学号 姓名 年龄 性别 分数");
str += singleStuInfo.className + "\t" + singleStuInfo.stuID + "\t" + singleStuInfo.stuName + "\t" + singleStuInfo.stuAge + "\t" + singleStuInfo.stuGender + "\t" + singleStuInfo.stuScore;
console.log(str);
console.log("请选择您要进行修改的学生信息： 1.姓名 2.年龄 3.性别 4.分数 5.返回");
let editSelect = parseInt(readline.question(""));
if (editSelect !== 5) {
editInfo(singleStuInfo, editSelect);
}
else {
editChoose = false;
break;
}
}
}
else {
console.log("对不起！没有找到对应的学生");
console.log("按回车键返回");
readline.question("");
break;
}
}
else {
if (classNo === stuInfo.length + 1) {
break;
}
else {
console.log("输入有误，请重新输入");
console.log("按回车键返回");
readline.question("");
}
}
}
}
break;
// 增加功能
case 3:
{
let addInfo = true;
while (addInfo) {
clear();
console.log("请选择您要添加的内容： 1.添加班级 2.添加学生 3.返回");
let addSelect = parseInt(readline.question(""));
switch (addSelect) {
case 1:
{
clear();
let length = stuInfo.length;
stuInfo[length] = [];
console.log("新增班级成功！按回车键返回");
readline.question("");
}
break;
case 2:
{
clear();
let classSelectStr = classSelect();
console.log(classSelectStr);
let classNo, addStuName, addStuAge, addStuGender, addStuScore;
classNo = parseInt(readline.question(""));
if (classCheck(classNo)) {
clear();
console.log("请输入要添加的学生的姓名：");
addStuName = readline.question("");
clear();
console.log("请输入要添加的学生的年龄：");
addStuAge = readline.question("");
while (true) {
clear();
console.log("请选择学生的性别： 1.男 2.女");
addStuGender = parseInt(readline.question(""));
if (addStuGender === 1 || addStuGender === 2) {
break;
}
else {
console.log("选择有误，请重新选择，按回车键继续");
readline.question("");
}
}
clear();
console.log("请输入要添加的学生的分数：");
addStuScore = parseInt(readline.question(""));
addStu(classNo, addStuName, addStuAge, addStuGender, addStuScore);
console.log("按回车键返回");
readline.question("");
}
else {
if (classNo === stuInfo.length + 1) {
break;
}
else {
console.log("输入有误，请重新输入");
console.log("按回车键返回");
readline.question("");
}
}
}
break;
case 3:
addInfo = false;
break;
default:
console.log("选择有误，请重新选择，按回车键继续");
readline.question("");
}
}
}
break;
// 删除功能
case 4:
{
let delInfo = true;
while (delInfo) {
clear();
console.log("请选择您要删除的项目： 1.删除班级 2.删除学生 3.返回");
let delSelect = parseInt(readline.question(""));
switch (delSelect) {
// 删除班级
case 1:
let delClassInfo = true;
while (delClassInfo) {
clear();
let classSelectStr = classSelect();
console.log(classSelectStr);
let classNo = parseInt(readline.question(""));
if (classCheck(classNo)) {
delClass(classNo);
delClassInfo = false;
}
else {
if (classNo === stuInfo.length + 1) {
break;
}
else {
console.log("输入有误，请重新输入");
console.log("按回车键返回");
readline.question("");
}
}
}
break;
// 删除学生
case 2:
{
let delStuInfo = true;
while (delStuInfo) {
clear();
let classSelectStr = classSelect();
console.log(classSelectStr);
let classNo = parseInt(readline.question(""));
if (classCheck(classNo)) {
clear();
console.log("请输入您要删除的学生的学号：");
let stuNo = readline.question("");
let singleStuInfo = stuCheck(classNo, stuNo);
delStuInfo = false;
if (singleStuInfo) {
delStu(classNo, singleStuInfo, "del");
}
else {
console.log("对不起！没有找到对应的学生");
console.log("按回车键返回");
readline.question("");
}
}
else {
if (classNo === stuInfo.length + 1) {
break;
}
else {
console.log("输入有误，请重新输入");
console.log("按回车键返回");
readline.question("");
}
}
}
}
break;
case 3:
delInfo = false;
break;
default:
console.log("输入有误，请重新输入，按回车键继续");
readline.question("");
}
}
}
break;
// 转班功能
// 核心思路：首先删除该学生，然后在其他班级上添加该学生
case 5:
{
let transfer = true;
let str = "";
while (transfer) {
clear();
let classSelectStr = classSelect();
console.log("(学生原本所在的班级)" + classSelectStr);
let classNo = parseInt(readline.question(""));
if (classCheck(classNo)) {
clear();
console.log("请输入您要转班的学生的学号：");
let stuNo = readline.question("");
let singleStuInfo = stuCheck(classNo, stuNo);
if (singleStuInfo) {
while (true) {
clear();
str = "";
let classSelectStr2 = classSelect();
console.log("班级 学号 姓名 年龄 性别 分数");
str += singleStuInfo.className + "\t" + singleStuInfo.stuID + "\t" + singleStuInfo.stuName + "\t" + singleStuInfo.stuAge + "\t" + singleStuInfo.stuGender + "\t" + singleStuInfo.stuScore;
console.log(str);
console.log("(学生要转去的班级)" + classSelectStr2);
let classNo2 = parseInt(readline.question(""));
if (classCheck(classNo2)) {
if (classNo === classNo2) {
transfer = false;
console.log("和原来班级相同！按回车键返回主菜单");
readline.question("");
}
else {
classTransfer(classNo, singleStuInfo, classNo2);
transfer = false;
console.log("转班成功，按回车键返回主菜单");
readline.question("");
}
break;
}
else {
if (classNo2 === stuInfo.length + 1) {
transfer = false;
break;
}
else {
console.log("输入有误，请重新输入");
console.log("按回车键返回");
readline.question("");
}
}
}
}
else {
console.log("对不起！没有找到对应的学生");
console.log("按回车键返回");
readline.question("");
break;
}
}
else {
if (classNo === stuInfo.length + 1) {
break;
}
else {
console.log("输入有误，请重新输入");
console.log("按回车键返回");
readline.question("");
}
}
}
}
break;
// 退出功能
case 6:
useSys = false;// 设置使用系统的标识 useSys的值为false
break;
default:
console.log("输入有误，请重新输入！(按回车键继续)");
readline.question("");
}
}
break;// 跳出外层的循环
}
else {
// 没有进入上面的if 说明账号密码输入有问题
loginChance--; // 登陆机会自减1
if (loginChance === 0)// 如果登录机会为0 直接跳出while循环
{
break;
}
else {
clear();
console.log(`账号密码错误，你还剩下${loginChance}次机会！(按回车键继续)`);
readline.question("");
}
}
}
// 根据loginChance的值来判断是用户主动跳出的，还是登录机会为0跳出的
if (loginChance === 0) {
clear();
console.log("错误次数过多！请稍后再试");
}
else {
clear();
console.log("感谢您的使用！");
}
}
main();
