#include <stdio.h>
int x = 1, y = 2;
void demo(void);
main()
{
printf("\nBefore calling demo(), x = %d and y = %d.", x, y);
demo();
printf("\nAfter calling demo(), x = %d and y = %d.", x, y);
return 0;
}
void demo(void)
{
/* Declare and initialize two local variables.*/
int x = 88, y= 99;
/* Display their values.*/
printf("\nWithin demo(), x = %d and y = %d.", x, y);
}