快速查找.c

#include<stdio.h>
#define MAXSIZE 100000
//typedef int KeyType;
typedef struct
{
    int r[MAXSIZE+1];
    int length;
}SqList;
int Partition(SqList *L,int low,int high)
{
    int  pivotkey;
    L->r[0]=L->r[low];
    pivotkey=L->r[low];
    while(low<high)
    {
        while(low<high&&L->r[high]>=pivotkey)
            --high;
        L->r[low]=L->r[high];
        while(low<high&&L->r[low]<=pivotkey)
            ++low;
        L->r[high]=L->r[low];
    }
    L->r[low]=L->r[0];
    return low;
}
void QSort(SqList *L,int low,int high)
{
    int pivotloc;
    if(low<high)
    {
        pivotloc=Partition(L,low,high);
        QSort(L,low,pivotloc-1);
        QSort(L,pivotloc+1,high);
    }
}
void QuickSort(SqList *L)
{
    QSort(L,1,L->length);
}
int main()
{
    int i,j,k,n;
    SqList L;
    scanf("%d",&L.length);
    L.r[0]=0;
    for(i=1;i<=L.length;i++)
    scanf("%d",&L.r[i]);
    QuickSort(&L);
    for(i=1;i<=L.length;i++)
        printf("%d ",L.r[i]);
    return 0;

}