/* * Here we compare two ways of passing parameters. */ #include <iostream> using namespace std; void f1(int a) { a += 10; } void f2(int &a) { a += 10; } int main() { int m = 15; cout << "m = " << m << endl; f1(m); cout << "m = " << m << endl; f2(m); cout << "m = " << m << endl; }