C++代码一直是执行错误

Question

#include<iostream>
#include<string>
#include<fstream>
using namespace std;
class citizen
{
private:
    char name[20];
    char sex;
    int age;
public:
    citizen();
    citizen(char name[], char sex, int age);
    virtual void show();
    ~citizen()
    {
        ofstream myout;
        myout.open("a.txt", ios::out | ios::app);
        cout << "this is the first destruction function!" << endl;
        myout << "this is the first destruction function!" << endl;
    }
};
class student :public citizen
{
private:
    char number[20];
    char classname[20];
public:
    student(char name[], char sex, int age, char number[], char classname[]) :citizen(name, sex, age)
    {
        strcpy_s(this->number, number);
        strcpy_s(this->classname, classname);
    }
    void show();
    ~student()
    {
        ofstream myout;
        myout.open("a.txt", ios::out | ios::app);
        cout << "this is the second destruction function!" << endl;
        myout << "this is the second destruction function!" << endl;
    }
};
citizen::citizen(char name[], char sex, int age)
{
    strcpy_s(this->name, name);
    this->sex = sex;
    this->age = age;
}
void citizen::show()
{
    ofstream myout;
    myout.open("a.txt", ios::out | ios::app);
    cout << "姓名为：" << name << endl;
    cout << "性别为：" << sex << endl;
    cout << "年龄为：" << age << endl;
    myout << "姓名为：" << name << endl;
    myout << "性别为：" << sex << endl;
    myout << "年龄为：" << age << endl;
}
void student::show()
{
    ofstream myout;
    myout.open("a.txt", ios::out | ios::app);
    citizen::show();
    cout << "学号为：" << number << endl;
    cout << "班级为：" << classname << endl;
    myout << "学号为：" << number << endl;
    myout << "班级为：" << classname << endl;
}
int main()
{
    ofstream myout;
    myout.open("a.txt", ios::out | ios::app);
    char name[20], number[20], classname[20];
    char sex;
    int age;
    citizen *c;
    cout << "请输入姓名，性别（男：m，女：f）,年龄" << endl;
    myout << "请输入姓名，性别（男：m，女：f）,年龄" << endl;
    cin >> name >> sex >> age;
    myout << name << '\t' << sex << '\t' << age << endl;
    c=&citizen(name, sex, age);
    cout << "公民类的输出：" << endl;
    myout << "公民类的输出：" << endl;
    c->show();
    cout << "请输入学号，班级" << endl;
    myout << "请输入学号，班级" << endl;
    cin >> number >> classname;
    myout << number << '\t' << classname << endl;
    c=&student(name, sex, age, number, classname);
    cout << "大学生类的输出：" << endl;
    myout << "大学生类的输出：" << endl;
    c->show();
    return 0;
}

Answer 1

首先…既然用了函數就把頭檔寫上…

#include <cstring>

然後，這份程式碼在clang下編譯失敗

如果在vs上可能能通過吧，手上沒有vs不知道。
指向臨時變數的指標是未定義的，臨時變數隨時可能被銷毀，所以存取被回收的記憶體可能會發生錯誤

以上

Answer 2

你好，下次提問請描述錯誤訊息。

我在vs 2015下運行沒有問題。

Answer 3

你這問題問的，程式碼一貼什麼都不解釋，那麼一長串程式碼你都不解釋一下你這是在幹嘛，怎麼個錯誤類型，想幫你都懶得看。 。