为什么最后delete时候析构函数会无限调用？

csu之c 2020-04-02 08:34:34

#include <iostream>

using namespace std;

class Student{

    public:

        Student(){num = 0; name[0] = '0'; sex[0] = '0'; age = 0; score[0] = {0}; average = 0;}

        void Setstudent(int n, char na[10], char s[3], int a, double sc1, double sc2, double sc3 = 0);

        void show();

        void Setaverage(double sc1, double sc2, double sc3);

        void Setaverage(double sc1, double sc2);

        double Getaverage(){return average;}

        ~Student(){cout << "析构函数" << endl;}

    private:

        int num;

        char name[10];

        char sex[3];

        int age;

        double score[3], average;

};



void Student::show(){

    cout << "学号：" << num << "\n姓名：" << name << "\n性别：" << sex

    << "\n年龄：" << age << "\n语文成绩：" << score[0] << "\n数学成绩：" << score[1];

    if(score[2] != 0) 

        cout << "\n英语成绩：" << score[2] << "\n平均成绩：" << average << endl;

    else cout << "\n平均成绩：" << average << endl;

}



void Student::Setaverage(double sc1, double sc2, double sc3){average = (sc1 + sc2 + sc3)/3;}

void Student::Setaverage(double sc1, double sc2){average = (sc1 + sc2)/2;}



void Student::Setstudent(int n, char na[10], char s[3], int a, double sc1, double sc2, double sc3)

{

    num = n; age = a; score[0] = sc1; score[1] = sc2; score[2] = sc3;

    for(int i = 0; i < 10; i++){name[i] = na[i];}

    for(int i = 0; i < 3; i++){sex[i] = s[i];}

}

int main() 

{       

    int n;

    cout << "请输入学生人数：";

    cin >> n;

    Student *p = new Student[n];

    Student *pt = p;

    double max1 = 0, max2 = 0, max3 = 0, sum1 = 0, sum2 = 0, sum3 = 0;

    for(int i = 0; i < n; i++, pt++){

        int num;

        char name[10];

        char sex[3];

        int age, n1;

        double sc1, sc2, sc3;

        cout << "请输入第" << i + 1 << "个学生信息" << endl;

        cout << "学号：";

        cin >> num;

        cout << "姓名：";

        cin >> name;

        cout << "性别：";

        cin >> sex;

        cout << "年龄：";

        cin >> age;

        cout << "科目数：";

        cin >> n1;

        cout << "各科成绩：";

        if(n1 == 2){

            cin >> sc1 >> sc2;

            if(sc1 > max1){max1 = sc1;}

            if(sc2 > max2){max2 = sc2;}

            sum1 += sc1; sum2 += sc2;

            (*pt).Setaverage(sc1, sc2); 

            (*pt).Setstudent(num, name, sex, age, sc1, sc2);

            }

        else{

                cin >> sc1 >> sc2 >> sc3;

                if(sc1 > max1){max1 = sc1;}

                if(sc2 > max2){max2 = sc2;}

                if(sc3 > max3){max3 = sc3;}

                sum1 += sc1; sum2 += sc2; sum3 += sc3;

                (*pt).Setaverage(sc1, sc2, sc3);

                (*pt).Setstudent(num, name, sex, age, sc1, sc2, sc3);

            }

        }

    for(int i = 0; i < n; i++, p++){

        cout << "第"<< i+1 << "位同学成绩：";

        p -> show();

    }

    delete[] p;

}