Some refresh on classes, childs & templates

main.cpp

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

int main()
{
    g_add<int> ADD;
    ADD.SumNums(10000, 100);
    std::cout << "Size of ADD object \n" << sizeof(ADD.getsize) << std::endl;
    aChild childFunction;
    childFunction.SumNums(10, 100);
    flag = true;
    isSummer("htwhtww");
}

operations.h

#ifndef OPERATIONS_H_INCLUDED
#define OPERATIONS_H_INCLUDED

static bool flag = false;
template <typename T>

class g_add {
  public:
    uint32_t test;
    uint32_t *getsize = &test;
    void SumNums(T n1, T n2) {
      std::cout << "The sum of " << n1 << " + " << n2 << " is " << n1+n2;

    }
};

class aChild: public g_add<int> { // Child function (g_add)
  public:
    int x = 10;
};

template <typename T>
void isSummer(T flag) {
  std::cout << "\nSummer flag is : " << flag << std::endl;
}


#endif // OPERATIONS_H_INCLUDED