Programs related Functions In C++

CODE

#include <iostream>
using namespace std;

int addition (int a, int b)
{
  int r;
  r=a+b;
  return r;
}

int main ()
{
  int z;
  z = addition (5,3);
  cout << "The result is " << z;
}

Output:

The result is 8

CODE:

#include <iostream>

using namespace std;

void printmessage ()

{

  cout << "I'm a function!";

}

int main ()

{

  printmessage ();

}

Output:

I'm a Function!