#include <stdio.h>

int main() {
    int a = 10, b = 20;
    int *p;
    
    p = &a;
    printf("p has the current value of %p\n", p);

    p = &b;
    printf("p now has the value of %p\n", p);

    p = (int*)1000;
    printf("p is now pointing to the address %p", p);

    return 0;
}