Question

I'm having a problem getting my code to function correct, *num_stu keeps losing its value when ever another function is called from the class. Can someone proof read this for me and let me know what'd up?

Header.h file
#include <iostream>

using namespace std;

class report {
   private:
       int* num_stu;
        int xx;
       int* id;
       double* gpa;

   public:
      
        report(int x) {
            num_stu = &x;
            xx = x;
            id = new int[*num_stu];
            gpa = new double[*num_stu];

            for (int i = 0; i < *num_stu; i++) {
                id[i] = 0;
                gpa[i] = 0;
            }
        }

        void assign() {
            cout <<"You still losing your value? " << *num_stu << endl << num_stu << xx << endl;;
            for (int i = 0; i < *num_stu; i++) {
                cout << "Enter ID: " << endl;
                cin >> id[i];
                cout << "Enter GPA: " << endl;
                cin >> gpa[i];
              
            }
        }

        void print_info() {

            for (int i = 0; i < *num_stu; i++) {
                cout << id[i] << " " << gpa[i] << " ";

                if (gpa[i] >= 3.8) {
                    cout << "an honor student. ";

                }
                cout << endl;
            }
        }

        ~report() {
            delete[]id;
            delete[]gpa;
        }

};

Main.cpp file

#include <iostream>
#include "report.h"

using namespace std;

int main() {
  
   report boy(5);
   boy.assign();
   boy.print_info();
}

Answer 1

class report {
private:
    int *num_stu;
    int xx;
    int *id;
    double *gpa;

public:

    report(int x) {
        num_stu = new int;  // create a new integer
        *num_stu = x;   // then use x to set value of num_stu
        xx = x;
        id = new int[*num_stu];
        gpa = new double[*num_stu];

        for (int i = 0; i < *num_stu; i++) {
            id[i] = 0;
            gpa[i] = 0;
        }
    }

    void assign() {
        cout << "You still losing your value? " << *num_stu << endl << num_stu << xx << endl;;
        for (int i = 0; i < *num_stu; i++) {
            cout << "Enter ID: " << endl;
            cin >> id[i];
            cout << "Enter GPA: " << endl;
            cin >> gpa[i];

        }
    }

    void print_info() {

        for (int i = 0; i < *num_stu; i++) {
            cout << id[i] << " " << gpa[i] << " ";

            if (gpa[i] >= 3.8) {
                cout << "an honor student. ";

            }
            cout << endl;
        }
    }

    ~report() {
        delete[]id;
        delete[]gpa;
    }
};