程序代码：

#include <stdio.h>
#include <stdlib.h>

int compare(const void *ptr1, const void *ptr2)
{
    return *(int*)ptr1 - *(int*)ptr2;
}

bool hasDuplicates(int *array, int size)
{
    qsort(array, size, sizeof(int), compare);
    for (int i = 0; i < size - 1; ++i)
    {
        if (array[i] == array[i+1])
            return true;
    }
    return false;
}

int main(void)
{
    int array1[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9};
    int array2[] = {0, 1, 1, 2, 3, 4, 5, 6, 7, 8};
    puts(hasDuplicates(array1, sizeof array1 / sizeof(int)) ? "YES" : "NO");
    puts(hasDuplicates(array2, sizeof array2 / sizeof(int)) ? "YES" : "NO");
    return 0;
}