cpptemplate3.cpp

#include <iostream>
 
using namespace std;
 
template <typename T> // add this line
T squareThis(T x){ // replace all occurrences of the type with "T"
    return x*x;
}
 
int main(){
    // specify the type you want to handle in angle brackets
    cout << squareThis<int>(2) << endl; // returns 4
    cout << squareThis<double>(2.5) << endl; // returns 6.25
}