编辑代码

#include <stdio.h>

int main () {
    
    int* arr[3];
    int **pp = arr;
    int a = 10;

    arr[1] = &a;
    *arr[1] = 20;
    printf("%d\n%d\n", *arr[1], a);
    **(pp+1) = 30;
    printf("%d\n%d\n", **(pp+1), a);

    return 0;
}