#include <iostream>
 
int anyFunc(int a, int b, int c = 0, int d = 0) {
    return a + b + c + d;
}
 
 
template <class T, class F>
T callFunc4(F func, T a, T b, T c = T(), T d = T()) {
    return func(a, b, c, d);
}
 
template <class T, class F>
T callFunc2(F func, T a, T b) {
    return func(a, b);
}
 
 
int main() {
    std::cout << callFunc4(anyFunc, 5, 5) << std::endl;
    std::cout << callFunc2([](int a, int b){ return anyFunc(a,b); }, 5, 5) << std::endl;
}
 

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