Tuples in C++

Tuple.cpp

#include <string>

using namespace std;

template <typename First, typename Second>
struct Tuple{
    First first;
    Second second;
};


template <typename First, typename Second>
Tuple<First, Second>* makeTuple(First first, Second second){
    Tuple<First, Second>* tuple = (struct Tuple<First, Second>*) malloc (sizeof(struct Tuple<First, Second>));
    tuple->first = first;
    tuple->second = second;
    return tuple;
}

// To avoid checks on generic types
string to_string(string s){ return s;}

template <typename First, typename Second>
string toString(Tuple<First,Second>* tuple){
    if (tuple == NULL){
        return "NULL";
    }else{
        return "(" + to_string(tuple->first) + ", " + to_string(tuple->second) + ")";
    }
}