Question

I have removed all the unwanted segments. I am trying to pass pointers to an overloaded operator and use templates too. But this is still not working.

#include<iostream.h>
#include<conio.h>

class Test{
      private:
             int a;
      public:
             Test (){}
             Test(int k){
                a=k;
             }
             Test* operator +(Test *p){
                  Test *temp=new Test(this->a+p->geta());
                  return temp;
             }
             int geta(){
                  return a;
             }
};

template<class T>  
   T* sum(T* a,T* b){
   return a+b;
}

int main(){
    Test *t1,*t2;
    t1=new Test(5);
    t2=new Test(7);
    Test *z=sum(t1,t2);
    cout<<z->geta();
    getch();
}

Answer 1

Firstly, t1 is a pointer, and you are calling the add method incorrectly – should be t1->add(t2). Secondly, the sum() methods takes arguments which are not pointers, i.e. the template parameter is deduced as Test rather than Test*, hence you need to change the signature to something like:

template <typename T>
T* sum(T* a, T* b)
{
  return a->add(b); // or some variant...
}