插入排序算法C语言实现

int insert_sort(int *list, int len)
{
    int i = 0;
    int j = 0;
    int tmp = 0;

    if((NULL == list) || (0 == len))
    {
        return 1;
    }

    for (int i = 1; i < len; i++) {
        int j = i;
        while (j > 0){
            if (list[j] < list[j-1]){
                printf("swap %d, %d --> list[%d], list[%d]", list[j-1], list[j], j-1, j);
                tmp = list[j];
                list[j] = list[j-1];
                list[j-1] = tmp;
                j--;
                getchar();
            }else {
                break;
            }
        }
    }
}