快速排序/堆排序

hsort.h

/*************************************************************************
        > File Name: heapsort.h
        > Author: zhoulin
        > Mail: [email protected]
        > Created Time: Wed Apr 13 12:52:15 2016
 ************************************************************************/

#ifndef _HEAPSORT_H
#define _HEAPSORT_H
typedef struct _heap{
    int *array;
    int  heapsize; //heap size
    int  len; //array len
}heap;
//swap a and b 
void swap(int *a,int *b);
void adjust(heap *p,int i);
void heap_sort(heap *p);

//-------------split--------------
int parttion(int *arr,int left,int right);
void quit_sort(int *arr,int start,int end);
#endif

hsort.c:

/*************************************************************************
        > File Name: heapsort.c
        > Author: zhoulin
        > Mail: [email protected]
        > Created Time: Wed Apr 13 12:55:18 2016
 ************************************************************************/

#include "hsort.h"
#include <stdio.h>
void swap(int *a,int *b)
{
    *a = *a^*b;
    *b = *a^*b;
    *a = *a^*b;
}
void adjust(heap *p,int i)
{
    if(p == NULL)
        return;
    int *array = p->array;
    int largest;
    int left = (i+1)<<1-1;
    int right = (i+1)<<1;
    int curmax = p->heapsize;
    if(left < curmax &&  array[left] > array[i])
    {
        largest = left;
    }else{
        largest = i;
    }
    if(right < curmax && array[right] > array[largest])
    {
        largest = right;
    }
    if(largest != i)
    {
        swap(&array[largest],&array[i]);
        adjust(p,largest);
    }
}
void heap_sort(heap *p)
{
    int *array = p->array;
    int i,len = p->len;
    for(i=(len>>1)-1;i>=0;i--)
    {
        fprintf(stdout,"build %d\n",i);
        adjust(p,i);
    }
    while(p->heapsize >0)
    {
        swap(&array[0],&array[p->heapsize]);
        p->heapsize--;
        adjust(p,0);
    }
}
int parttion(int *arr,int left,int right)
{
    int cur = arr[left];
    while(left < right && arr[right] >= cur)
    {
        right--;
    }
    if(left < right)
    {
        arr[left++] = arr[right];
    }
    while(left < right && arr[left] <= cur)
    {
        left++;
    }
    if(left < right)
    {
        arr[right--] = arr[left];
    }
    arr[left] = cur;
    return left;
}

void quit_sort(int *arr,int start,int end)
{
    int pos;
    if(start <= end)
    {
        pos = parttion(arr,start,end);
        quit_sort(arr,0,pos-1);
        quit_sort(arr,pos+1,end);
    }
}
int main(void)
{
    heap p;
    int i;
    int arr[9]={100,1,300,56,34,45,67,21,89};
    /*
    p.array = (int *)&arr;
    */
    int len = 9;
    for(i = 0;i< len;i++)
    {
        fprintf(stdout,"arr[%d] = %d\n",i,arr[i]);
    }
    fprintf(stdout,"-----------------------------------------\n\n");
    quit_sort(arr,0,len-1);
    /*
    p.len = len;
    p.heapsize = p.len -1;
    heap_sort(&p);
    */
    for(i = 0;i< len;i++)
    {
        fprintf(stdout,"arr[%d] = %d\n",i,arr[i]);
    }
    return 0;
}

运行结果：

root@:~/code/cwork/demo:./hsort 
arr[0] = 100
arr[1] = 1
arr[2] = 300
arr[3] = 56
arr[4] = 34
arr[5] = 45
arr[6] = 67
arr[7] = 21
arr[8] = 89
-----------------------------------------

arr[0] = 1
arr[1] = 21
arr[2] = 34
arr[3] = 45
arr[4] = 56
arr[5] = 67
arr[6] = 89
arr[7] = 100
arr[8] = 300