#include <iostream>
using namespace std;
double composition(double a, double b) {
return a * b;
}
int composition(int a, int b) {
return a * b;
}
int main() {
cout << "composition double a * double b = " << composition(1.5, 2.5) << endl;
cout << "composition int a * int b = " << composition(4, 2) << endl;
return 0;
}