#include <functional>
#include <iostream>
#include <string>
using namespace std;

int add(int a, int b) {
    return a + b;
}

template <typename A, typename B, typename ret>
function<ret(B)> curry(ret (*func)(A, B), A a) {
    return [=] (B b) -> ret {
        return func(a, b);
    };
}

int main(void) {
    auto x = curry(add, 5);
    cout << x(25) << endl; // Prints 30
}