#include <stdio.h>
#include <string.h>

int x = 2;
int y = 3;

int multiply ( int x, int y )
{

  return x * y;


}

int multiply_unpassed ()
{

  x = x + 1;
  return 0;

}

int change_value (int *ptrMyPointer)
{

  *ptrMyPointer = 9;
  return 0;

}


int main (int argc, char *argv[])
{
  int iMyInt = 7;

  printf ("Result %d \n" , multiply ( x, y));
  printf ("x = %d y = %d\n", x, y);
  multiply_unpassed();
  printf ("x = %d y = %d\n", x, y);

  printf ("iMyInt = %d \n", iMyInt);

  change_value(&iMyInt);

  printf ("iMyInt = %d \n", iMyInt);

}