#include<iostream>
#include<fstream>
#include<string>
using namespace std;
void append()
{
    int add;
    fstream outfileNumber("number.txt",ios::app) ;
    fstream outfileName("name.txt",ios::app);
    fstream outfileSex("sex.txt",ios::app);
    fstream outfileAge("age.txt",ios::in);
    fstream studentNumber("studentNumber.tex",ios::in);
    if((!outfileNumber)||(!outfileName)||(!outfileSex)||(!outfileAge))
    {
        cout <<"文件打开错误！"<<endl;
        exit(1);
    }
    cout <<"输入添加学生个数：";
    cin >>add;
    studentNumber <<add;
    class student
    {
    public:
        long int num;
        string name;
        char sex;
        int age;
    };
student *stu=new student [add];
        for(int i=0;i<add;i++)
        {
            cout <<"输入学号：";
            cin >>stu[i].num;
            outfileNumber <<stu[i].num;
            cout <<"输入姓名：";
            getline (cin,stu[i].name);
            outfileName <<stu[i].name;
            cout <<"输入性别：";
            cin >>stu[i].sex;
            outfileSex <<stu[i].sex;
            cout <<"输入年龄：";
            cin >>stu[i].age;
            outfileAge <<stu[i].age;
        }
        outfileNumber.close();
        outfileName.close();
        outfileSex.close();
        outfileAge.close();
        studentNumber.close();
}
int main()
{
    append();
    return 0;
}