/* Passing arguments by value and by reference.

*/ #include <stdio.h>

void by_value(int a, int b, int c);
void by_ref(int *a, int *b, int *c);

main()
{
     int x = 2, y = 4, z = 6;

     printf("\nBefore calling by_value(), x = %d, y = %d, z = %d.",
         x, y, z);

     by_value(x, y, z);

     printf("\nAfter calling by_value(), x = %d, y = %d, z = %d.",
         x, y, z);

     by_ref(&x, &y, &z);

     printf("\nAfter calling by_ref(), x = %d, y = %d, z = %d.",
         x, y, z);
    return(0);
}

void by_value(int a, int b, int c)
{
     a = 0;
     b = 0;
     c = 0;
}

void by_ref(int *a, int *b, int *c)
{
     *a = 0;
     *b = 0;
     *c = 0;
}