템플릿 예제

 
using namespace std;
 
template <typename I, typename J>
auto add(I i, J j) -> decltype (i + j){
    return i + j;
}
 
template <typename T>
auto co_T(T t_) -> decltype (t_){
    cout << typeid (t_).name() << " : " << t_ << endl;
 
    return t_;
}
 
int main(int argc, char *argv[])
{
 
    auto d = add<int , double>(2, 2.5);
 
    co_T(d);
 
 
    return 0;
 
}