501. Template

#include <iostream>
template <typename T1,class T2>
int Add(T1 t1,T2 t2)
{
    std::cout << typeid(t1).name() << std::endl;
    std::cout << typeid(t2).name() << std::endl;

    return t1 + t2;
}

int main(int argc, const char * argv[])
{
    std::cout << Add<int,int>(1,2) << std::endl;
    std::cout << Add(1,2.1) << std::endl;
    //std::cout << Add("T1","T2") << std::endl; // compile error
    
    return 0;
}

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int Add(int t1,int t2)
{
    std::cout << typeid(t1).name() << std::endl;
    std::cout << typeid(t2).name() << std::endl;

    return t1 + t2;
}

template <typename T1,class T2>
int Add(T1 t1,T2 t2);

#include <iostream>
template <typename T1,class T2>
class Calculator
{
public:
    static int Add(T1 t1,T2 t2)
    {
        std::cout << typeid(t1).name() << std::endl;
        std::cout << typeid(t2).name() << std::endl;
        
        return t1 + t2;
    }
    
    template <typename T3,class T4>
    int Add2(T3 t1,T4 t2)
    {
        std::cout << typeid(t1).name() << std::endl;
        std::cout << typeid(t2).name() << std::endl;
        
        return t1 + t2;
    }
};

int main(int argc, const char * argv[])
{
    std::cout << Calculator<int,int>::Add(1,2) << std::endl;
    //std::cout << Calculator::Add(1,2.1) << std::endl; // compile error
    return 0;
}