#include <iostream>

template <typename aType>
class testClass{
public:
       aType data;
       testClass(aType c): data(c) {};
       bool friend operator==(testClass<aType> a, testClass<aType> b){return a.data==b.data;} ;
};


int main(){
       int a=4;
       testClass<int> b(4);
       if (a==b) std::cout << "a equals b\n";
       if (b==a) std::cout << "b equals a\n";
};