/*
 * A program demonstrating printing with pointers.
 */

 #include <stdio.h>

int main()
{
    int a = 12;
    int *x;
    x = &a;
    *x = 6;

    printf("*x: %d\n", *x);
    printf(" a: %d\n\n", a);
    
    printf("  x: %p\n", x);
    printf(" &x: %p\n", &x);
    printf(" &a: %p\n\n", &a);

    int *y;
    y = x;
    printf("*y: %d\n", *y);
    printf(" a: %d\n\n", a);

    *x = 12;
    printf("*x: %d\n", *x);
    printf("*y: %d\n", *y);
    printf(" a: %d\n\n", a);

    int **px = &x; // px is a pointer to x
    (**px)++;
    printf("**px: %d\n", **px);
    printf("   a: %d\n", a);
}