选择排序

int *select_sort(int *a, int length) {
    for (int i = 0; i < length; i++) {
        int min_value_index = i;
        for (int j = i + 1; j < length; j++) {
            // select the min value index and record it
            if (a[min_value_index] > a[j]) {
                min_value_index = j;
            }
        }
        if (min_value_index != i) {
            int temp = a[min_value_index];
            a[min_value_index] = a[i];
            a[i] = temp;
        }
       // print(a, length);
    }
    return a;
}