1#include <stdio.h>
2int main() {
3    int arr[4] = {10, 20, 30, 40};
4    int *p = arr;
5    p[1] = 99;
6    *(p + 2) += 5;
7    printf("%d %d %d %d", arr[0], arr[1], arr[2], arr[3]);
8    return 0;
9}