[Solved] c++ class two dynamic attributes [closed]

by


Change A renew() to void renew() and the code works.

#include<iostream>
using namespace std;

class A{
private:

int **m1;
int **m2;

void allocate_mem(int ***ptr){
    *ptr = new int*[1];
    (*ptr)[0] = new int[1];
}

public:

A(){
    allocate_mem(&m1);
    m1[0][0] = 1;
    allocate_mem(&m2);
    m2[0][0] = 1;
}

//I need a method that change m2 (according to the value of m1) without changhig the value of m1
void renew(){
    if(m1[0][0]>0)
        m2[0][0] = 1000;
}

~A(){
    delete[] m1[0];
    delete[] m1;
    delete[] m2[0];
    delete[] m2;
}

void create_output(){
    cout << m1[0][0] << endl << m2[0][0] << endl;
}

};

int main(){
  A mat;
  mat.create_output();
  mat.renew();
  mat.create_output();

  return 0;
}

This produces:

 1
 1
 1
 1000

solved c++ class two dynamic attributes [closed]