#include <stdio.h>
#define M 100
int main() {
    int arr[M];
    int i = 0, temp;
    while (1) {
        scanf("%d", &arr[i]);
        if (arr[i] == 0) {
            break;
        }
        i++;
    }
    for (int j = 0; j < i / 2; j++) {

        temp = arr[j];       
        arr[j] = arr[i - j];  
        arr[i - j] = temp;    
    }
  
    for (int x = 1; x <= i; x++) {
        printf("%d ", arr[x]);
    }
    return 0;
}

哪里有问题