How to get value through inheritance, if I have array with objects from first object and second? [duplicate]

How to get value through inheritance, if I have array with objects from first object and second? I have array with type A in object B. And in main function I put element A and B, I want get value countFiles B with from array How do it? (Can't use stl containers, only array and pointers)

#include <iostream>  class A  {  private:          public:      A(){};      A(int size) : size(size){};      int size;  };    class B : public A  {  public:      A *arr;      int countFiles = 5;        B(int size, int countFiles)      {          this->size = size;          this->countFiles = countFiles;      }  };    int main()  {      B *kek = new B(0, 4);      A element1(5);      A element2(6);      A element3(7);      B lol(0, 3);        kek->arr = new A[5];        kek->arr[0] = element1;      kek->arr[1] = element2;      kek->arr[2] = element3;      kek->arr[4] = lol;        for (int i = 0; i < 5; i++)      {          if (kek->arr[i].size == 0)          {              std::cout << ((B*)(&kek->arr[i]))->countFiles << std::endl;          }      }      system("pause>nul");      return 0;  }  

should give 3 but it gives out -146198184

https://stackoverflow.com/questions/65835335/how-to-get-value-through-inheritance-if-i-have-array-with-objects-from-first-ob January 22, 2021 at 04:34AM