快速排序代码，执行后没结果，那个环节出了问题求大佬们指教 感谢

#include<stdio.h>
void swap(int *d,int k,int m)
{
    int temp;
    temp=*(d+k);
    *(d+m)=*(d+k);
    *(d+m)=temp;
}
int sort(int *b,int lows,int highs)
{
    //int low,high;
    int middle=b[0];
    if(lows<highs)
    {
        while(lows<highs&&b[highs]>=middle)
            highs--;
        swap(b,highs,lows);
        while(lows<highs&&b[lows]<=middle)
            lows++;
        swap(b,lows,highs);
    }
    return lows;
}
void Quicksort(int a[],int low,int high)
{
    int mid;
    mid=sort(a,low,high);
    Quicksort(a,1,mid-1);
    Quicksort (a,mid+1,9);
}

int main()
{

    int i;
    int a[10]={50,10,90,30,70,40,80,60,20,100};
    Quicksort(a,1,9);


    for(i=0;i<10;i++)
        printf("%2d",a[i]);
    printf("victory");
    return 0;
}