C++版-学生考勤系统 不能运行私信骂我

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有问题私信问我，也可以查看C语言的相关代码注释，可以帮助你更好理解C++版

#include <iostream>
#include <string>

struct Student
{
    std::string name;
    int age;
    int num;
    int c;
    float date;
    std::string Attandance_Result;
};

void PrintfStudentFunction();
int numCount = 0;
int count = 0;

int Num()
{
    int num;
    std::cout << "请输入要录入学生的人数" << std::endl;
    std::cin >> num;
    return num;
}

Student* Input(Student* pArr, int len)
{
    count = len;
    pArr = new Student[len];
    
    for (int i = 0; i < len; i++)
    {
        numCount++;
        std::cout << "请输入第" << i + 1 << "个学生的名字:" << std::endl;
        std::cin >> pArr[i].name;
        std::cout << "请输入第" << i + 1 << "个学生的年龄" << std::endl;
        std::cin >> pArr[i].age;
        std::cout << "请输入第" << i + 1 << "个学生的学号" << std::endl;
        std::cin >> pArr[i].num;
        std::cout << "请输入第" << i + 1 << "个学生的班级" << std::endl;
        std::cin >> pArr[i].c;
        std::cout << "请输入第" << i + 1 << "个学生的打卡时间（xx.xx）" << std::endl;
        std::cin >> pArr[i].date;
        std::cout << "请输入第" << i + 1 << "个学生的考勤结果（出勤  旷课  事假  病假  迟到  早退）" << std::endl;
        std::cin >> pArr[i].Attandance_Result;
    }
    std::cout << "学生信息录入完毕!!!!!!!" << std::endl;
    PrintfStudentFunction();
    return pArr;
}

void Output(Student* pArr)
{
    std::cout << "姓名\t年龄\t学号\t班级\t打卡时间   出勤结果" << std::endl;
    for (int i = 0; i < numCount; i++)
    {
        std::cout << pArr[i].name << "\t" << pArr[i].age << "\t" << pArr[i].num << "\t" << pArr[i].c 
                  << "\t" << pArr[i].date << "\t    " << pArr[i].Attandance_Result << std::endl;
    }
    PrintfStudentFunction();
}

void Delete(Student* pArr)
{
    int num;
    std::cout << "请输入你要删除学生的学号" << std::endl;
    std::cin >> num;
    
    int count = 0; // 记录匹配学号的学生数量
    int* indices = new int[numCount]; // 用于存储匹配学号的学生索引
    
    for (int i = 0; i < numCount; i++)
    {
        if (pArr[i].num == num)
        {
            indices[count] = i;
            count++;
        }
    }
    
    if (count > 0)
    {
        for (int i = 0; i < count; i++)
        {
            int index = indices[i];
            
            for (int j = index; j < numCount - 1; j++)
            {
                pArr[j] = pArr[j + 1];
            }
        }
        
        numCount -= count;
        
        Output(pArr);
    }
    else
    {
        std::cout << "未找到匹配学号的学生" << std::endl;
    }
    
    delete[] indices; // 释放动态数组内存
}


void Search(Student* pArr)
{
    std::cout << "请输入要查找学生的名字" << std::endl;
    std::string name;
    std::cin >> name;
    std::cout << "姓名\t年龄\t学号\t班级\t打卡时间   出勤结果" << std::endl;
    for (int i = 0; i < numCount; i++)
    {
        if (pArr[i].name == name)
        {
            std::cout << pArr[i].name << "\t" << pArr[i].age << "\t" << pArr[i].num << "\t" 
                      << pArr[i].c << "\t" << pArr[i].date << "\t    " << pArr[i].Attandance_Result << std::endl;
        }
    }
    PrintfStudentFunction();
}

void Change(Student* pArr)
{
    std::string name;
    std::cout << "请输入你要修改学生的名字:" << std::endl;
    std::cin >> name;
    int num = 0;
    for (int i = 0; i < numCount; i++)
    {
        if (pArr[i].name == name)
        {
            num = i;
            break;
        }
    }
    if (num == numCount)
    {
        std::cout << "对不起没有要修改的学生信息" << std::endl;
    }
    else
    {
        std::cout << "请输入修改后的学生名字:" << std::endl;
        std::cin >> pArr[num].name;
        std::cout << "请输入学生的年龄:" << std::endl;
        std::cin >> pArr[num].age;
        std::cout << "请输入学生的学号:" << std::endl;
        std::cin >> pArr[num].num;
        std::cout << "请输入学生的班级:" << std::endl;
        std::cin >> pArr[num].c;
        std::cout << "请输入学生的打卡时间:" << std::endl;
        std::cin >> pArr[num].date;
        std::cout << "请输入学生的考勤结果（出勤  旷课  事假  病假  迟到  早退）:" << std::endl;
        std::cin >> pArr[num].Attandance_Result;
    }
    PrintfStudentFunction();
}

Student* Add(Student* pArr)
{
    std::cout << "请输入要添加的人数" << std::endl;
    int num;
    std::cin >> num;
    if (numCount + num > count)
    {
        Student* p = pArr;
        pArr = new Student[numCount + num];
        count = numCount + num;
        for (int i = 0; i < numCount; i++)
        {
            pArr[i] = p[i];
        }
    }
    for (int i = 0; i < num; i++)
    {
        std::cout << "请输入第" << i + 1 << "个添加学生的名字:" << std::endl;
        std::cin >> pArr[numCount].name;
        std::cout << "请输入第" << i + 1 << "个添加学生的年龄:" << std::endl;
        std::cin >> pArr[numCount].age;
        std::cout << "请输入第" << i + 1 << "个添加学生的学号:" << std::endl;
        std::cin >> pArr[numCount].num;
        std::cout << "请输入第" << i + 1 << "个添加学生的班级:" << std::endl;
        std::cin >> pArr[numCount].c;
        std::cout << "请输入第" << i + 1 << "个添加学生的打卡时间:" << std::endl;
        std::cin >> pArr[numCount].date;
        std::cout << "请输入第" << i + 1 << "个添加学生的考勤结果（出勤  旷课  事假  病假  迟到  早退）:" << std::endl;
        std::cin >> pArr[numCount].Attandance_Result;
        numCount++;
    }
    std::cout << "数据添加成功" << std::endl;
    PrintfStudentFunction();
    return pArr;
}

void Order(Student* pArr)
{
    int op;
    std::cout << "<1>学号升序  <2>姓名升序" << std::endl;
    std::cin >> op;
    if(op == 1)
    {
        for(int i = 0; i < numCount - 1; i++)
        {
            for(int j = 0; j < numCount - i - 1; j++)
            {
                if(pArr[j].num > pArr[j+1].num)
                {
                    Student temp = pArr[j];
                    pArr[j] = pArr[j+1];
                    pArr[j+1] = temp;
                }
            }
        }
    }
    else if(op == 2)
    {
        for(int i = 0; i < numCount - 1; i++)
        {
            for(int j = 0; j < numCount - i - 1; j++)
            {
                if(pArr[j].name > pArr[j+1].name)
                {
                    Student temp = pArr[j];
                    pArr[j] = pArr[j+1];
                    pArr[j+1] = temp;
                }
            }
        }
    }
    Output(pArr);
}

void PrintfStudentFunction()
{
    std::cout << "-------------------------------------------------" << std::endl;
    std::cout << "-----------------学生考勤管理系统----------------" << std::endl;
    std::cout << "-----------------1.录入学生信息------------------" << std::endl;
    std::cout << "-----------------2.输出学生信息------------------" << std::endl;
    std::cout << "-----------------3.删除学生信息------------------" << std::endl;
    std::cout << "-----------------4.修改学生信息------------------" << std::endl;
    std::cout << "-----------------5.查询学生信息------------------" << std::endl;
    std::cout << "-----------------6.添加学生信息------------------" << std::endl;
    std::cout << "-----------------7.排序（学号、姓名）------------" << std::endl;
    std::cout << "-----------------8.退出系统----------------------" << std::endl;
    std::cout << "-------------------------------------------------" << std::endl;
}

int main()
{
   


// 修改为
Student* pArr = 0;

    PrintfStudentFunction();
    
    while (true)
    {
        std::cout << "请选择操作的命令:" << std::endl;
        int item, num;
        std::cin >> item;
        
        switch (item)
        {
        case 1:
            num = Num();
            pArr = Input(pArr, num);
            break;
        case 2:
            Output(pArr);
            break;
        case 3:
            Delete(pArr);
            break;
        case 4:
            Change(pArr);
            break;
        case 5:
            Search(pArr);
            break;
        case 6:
            pArr = Add(pArr);
            break;
        case 7:
            Order(pArr);
            break;
        case 8:
            delete[] pArr;
            return 0;
        default:
            std::cout << "用户输入错误,请重新输入" << std::endl;
            break;
        }
    }
    return 0;
}

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