i have written a program for average of two numbers but it's not working?

Question

https://www.onlinegdb.com/edit/BJj9kDBK7 . here is the link

Answer 1

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Answer 2

#include <iostream>

template<class T, class V>
double average2Nums (T a, V b){
    return double((a + b)/2);
}

int main()
{   
    double ans = average2Nums<int, int>(1,2);
    std::cout << ans;
    return 0;
}