#include <stdio.h>
void greatervalue(int *x, int *y, int *ptr);
int main ()
{
    int i, j;
    int *ptr;

    printf("From the main...\n");
    printf("Enter two integers: ");
    scanf("%d %d", &i, &j);

    printf("\nCalling the function...\n");

    greatervalue(&i, &j, &ptr);

    printf("From main...\n");
    printf("Dereferencing the pointer: %d\n", *ptr);

    system("PAUSE");
    return 0;
}

void greatervalue(int *x, int *y, int *ptr)
{
     if(*x>*y)
       *ptr=x;
     else
       *ptr=y;
     printf("Function returning...\n\n");
     return 0;
}