能做一下这个代码吗，谢谢谢谢

数组的基本操作，录入、修改和统计
运行结果：

代码：

#define _CRT_SECURE_NO_WARNINGS 1
#include <iostream>
#include <string>
#include <iomanip>
#include <time.h>
using namespace std;
int N; //登录次数
const char* g_name = "admin";
const char* g_pwd = "12345";
const char* g_rand = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";


int g_stuScore[100]; //保存所有学生的C语言成绩
int g_stuNmb; //学生数量


int Login()
{
    int i;
    char rd[5] = { 0 },rd2[5]={0};
    char name[20], pwd[20];
    cout << "请输入最大登录次数：";
    cin >> N;
    srand(time(0));
    
    
    //输入用户名
    for (i = 0; i < N; i++)
    {
        cout << "请输入用户名：";
        cin >> name ;
        cout << "请输入密码：";
        cin >> pwd;

        //生成随机验证码
        for (int j = 0; j < 4; j++)
        {
            int index = rand() % 62;//生成0-61的随机数
            rd[j] = g_rand[index];
        }

        cout << "验证码：" << rd << endl;
        cout << "请输入验证码：";
        cin >> rd2;
        if (strcmp(name, g_name) == 0 && strcmp(pwd, g_pwd) == 0)
        {
            if (strcmp(rd, rd2) == 0)
            {
                cout << "登录成功！";
                system("pause");
                return 1;
            }
            else
            {
                cout << "验证码错误，请重新输入：\n";
            }
        }
        else
        {
            if (i < N - 1)
                cout << "用户名或密码错误，请重新输入："<<endl;
        }
    }
    if (i == N)
    {
        cout << "输入次数超过" << N << "次，登录失败!" << endl;
        system("pause");
        return 0;
    }
    return 0;
}

//系统功能
//1.录入
void input()
{
    system("cls");
    cout << "请输入学生数量：";
    cin >> g_stuNmb;
    for (int i = 0; i < g_stuNmb; i++)
    {
        cout << "请输入学生" << i + 1 << "的C语言成绩：";
        cin >> g_stuScore[i];
    }
    cout << "录入完成！" << endl;
    system("pause");
}
//2.显示
void show()
{
    system("cls");
    cout << "学生成绩信息如下：" << endl;
    for (int i = 0; i < g_stuNmb; i++)
        cout  << g_stuScore[i] << endl;
    system("pause");
}
//3.插入
void add()
{
    system("cls");
    int sc;
    cout << "请输入要插入的分数：" ;
    cin >> sc;
    for (int i = g_stuNmb; i >= 2; i--)
        g_stuScore[i] = g_stuScore[i - 1];
    g_stuScore[1] = sc;
    g_stuNmb += 1;
    cout << "插入成功，插入后";
    show();
    
}

//4.删除
void del()
{
    system("cls");
    for (int i = 1; i <g_stuNmb-1; i++)
        g_stuScore[i] = g_stuScore[i + 1];
    g_stuNmb -= 1;
    cout << "删除成功，删除后";
    show();
    
}
//5.修改
void change()
{
    system("cls");
    int sc;
    cout << "请输入修改后的分数：";
    cin >> sc;
    
    g_stuScore[g_stuNmb-1] = sc;

    cout << "修改成功，修改后";
    show();
    
}
//6.统计
void tongji()
{
    system("cls");
    int total = 0;
    int maxscore = g_stuScore[0];
    float ave;
    for (int i = 0; i < g_stuNmb; i++)
    {
        if (g_stuScore[i] > maxscore)
            maxscore = g_stuScore[i];
        total += g_stuScore[i];
    }
    ave = 1.0* total / g_stuNmb;
    cout << "总分：" << total << endl;
    cout << "平均分：" << fixed << setprecision(2) << ave << endl;//保留2位小数
    cout << "最高分：" << maxscore << endl;
    system("pause");
}

void func()
{
    int op;
    while (1)
    {
        system("cls");
        cout << "==============================" << endl;
        cout << "   欢迎来到学生成绩管理系统" << endl;
        cout << "******************************" << endl;
        cout << "     请选择要操作的命令" << endl;
        cout << "******************************" << endl << endl;
        cout << "     1.录入学生信息" << endl;
        cout << "     2.显示学生信息" << endl;
        cout << "     3.增加学生信息" << endl;
        cout << "     4.删除学生信息" << endl;
        cout << "     5.修改学生信息" << endl;
        cout << "     6.输出总分、平均分、最高分" << endl;
        cout << "     7.退出系统" << endl;
        cout << "==============================" << endl;
        cin >> op;
        switch (op)
        {
        case 1:input(); break;
        case 2:show(); break;
        case 3:add(); break;
        case 4:del(); break;
        case 5:change(); break;
        case 6:tongji(); break;
        case 7:return;
        }
    }
}

int main()
{
    if (Login())
    {
        func();
    }
    return 0;
}

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