#include <stdio.h>
 
int main(void)
{
    int a[][3] = {{10, 20, 30},
                  {40, 50, 60},
                  {70, 80, 90}};
    int *p[] = {a[0], a[1], a[2]};
    int (*q)[3] = a;
 
    printf("sizeof(int) = %zu\n", sizeof(int));
    printf("sizeof p[0] = %zu\n", sizeof p[0]);
    printf("sizeof q[0] = %zu\n", sizeof q[0]);
    printf("&a = %p\n", (void *)&a);
    printf("&p = %p\n", (void *)&p);
    printf("&q = %p\n", (void *)&q);
 
    printf("sizeof a = %zu\n", sizeof a);
    printf("sizeof p = %zu\n", sizeof p);
    printf("sizeof q = %zu\n", sizeof q);
 
    printf("**a = %d\n", **a);
    printf("a[1][1] = %d\n", a[1][1]);
    printf("*a[1] = %d\n", *a[1]);
    printf("(*a + 1)[1] = %d\n", (*a + 1)[1]);
    printf("*(a + 1)[1] = %d\n", *(a + 1)[1]);
 
    printf("**p = %d\n", **p);
    printf("p[1][1] = %d\n", p[1][1]);
    printf("*p[1] = %d\n", *p[1]);
    printf("(*p + 1)[1] = %d\n", (*p + 1)[1]);
    printf("*(p + 1)[1] = %d\n", *(p + 1)[1]);
 
    printf("**q = %d\n", **q);
    printf("q[1][1] = %d\n", q[1][1]);
    printf("*q[1] = %d\n", *q[1]);
    printf("(*q + 1)[1] = %d\n", (*q + 1)[1]);
    printf("*(q + 1)[1] = %d\n", *(q + 1)[1]);
 
    return 0;
}

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