int char_compare(void const * c1,void const* c2) //比较函数
{
    int a = *((int*)c1);
    int b = *((int*)c2);
    return a>b ? 1 : a<b ? -1 : 0;
}

void Swap(char *str1,char *str2,int size) 
{
    while (size--)
    {
        char tmp = *str1;
        *str1 = *str2;
        *str2 = tmp;
        str1++;str2++;
    }
}
void MyQsort(void *str,int len,int elen,int(*compare)(void const*,void const*))  //基于回调函数写的排序算法
{
    int i = 0;
    int j = 0;
    int flag = 1;
    for (i=0; i<len-1; i++)
    {
        for (j=0; j<len-1-i; j++)
        {
            if (compare((char*)str+j*elen,(char*)str+(j+1)*elen)>0)
            {
                flag = 0;
                Swap((char*)str+j*elen,(char*)str+(j+1)*elen,elen);
            }
        }
        if (flag)
            return;
    }
}