// C++ Program to demonstrate working of a function
#include <iostream>
using namespace std;
// Following function that takes two parameters 'x' and 'y'
// as input and returns max of two input numbers
int max(int x, int y)
{
if (x > y)
return x;
else
return y;
}
// main function that doesn't receive any parameter and
// returns integer
int main()
{
int a = 10, b = 20;
// Calling above function to find max of 'a' and 'b'
int m = max(a, b);
cout << "m is " << m;
return 0;
}