C语言中判断数组中有没有重复

Question

请问我这么写有什么问题吗？

#include <stdio.h>

int all_different(int A[], int n);

int
main(int argc, char *argv[]) {

    int i_arr[10];

    printf("%d\n", all_different(&i_arr[3, 4, 8, 2, 6, 4], 5));

    return 0;
}

int
all_different(int A[], int n) {

    for (int i=0; i<n; i++) {
        for (int j = i+1; j < n; j++) {
            if (A[i] == A[j]) {
                return 0;
            }
        }
    }
    return 1;
}

Answer 1

int main(int argc, char *argv[])
{

    int i_arr[10]={3, 4, 8, 2, 6, 4};

    printf("%d\n", all_different(i_arr, 6));

    return 0;
}