C++ - Templates - Where's the error?

Question

Why doesn't this code function for "int" and "double"?

#include <iostream>
using namespace std;

template <class T>
T templating (T a, T b, T c){
T max = a;
if(b > max){
max = b;
}
if(c > max){
max = c;
}
return max;
};

int main() {
cout << templating(1,4.7,3.9);
return 0;
}

Answer 1

All types are of type T so all arguments have to be of the same type. If you want to use different types you'd need to use something like
T templating(U a, V b, W c)