Hey is it nrccessary to tell the compiler what datatypes are used? I thought it calculates the datatype automatically?

Question

#include <iostream>
using namespace std;

template <class T>
class Pair {
private:
T first, second;
public:
Pair (T a, T b):
first(a), second(b) { }
T bigger();
};

template <class T>
T Pair<T>::bigger() {
return (first>second ? first : second);
}

int main()
{
Pair <int> obj(11, 22);
cout << obj.bigger();

return 0;
}

Answer 1

Yes you should tell it. Btw your code has run successfully.