快速排序的实现(c语言)

以前写的代码

//
//  main.c
//  cTest
//
//  Created by Zizhu on 13-10-8.
//  Copyright (c) 2013年 Zizhu. All rights reserved.
//

#include <stdio.h>

#define N (10)

void quickSor(int *nums, int indexStart, int indexEnd);
int  partition(int *nums, int indexStart, int indexEnd);
void exchange(int *nums, int p1, int p2);
void printNums(int *nums, int count);

int main()
{
	printf(">>>strat
");
	int nums[N] = {0, 4, 2, 5, 1, 3, -1, 19, 99, -100};
	printNums(nums, N);
	int mid = partition(nums, 0, N-1);
	printNums(nums, N);
	printf("mid = %d
", mid);
	quickSor(nums, 0, N-1);
	printNums(nums, N);
	return 0;
}

void quickSor(int *nums, int indexStart, int indexEnd)
{
	if (indexEnd > indexStart)
	{
		int indexMid = partition(nums, indexStart, indexEnd);
		quickSor(nums, indexStart, indexMid-1);
		quickSor(nums, indexMid+1, indexEnd);
	}
	
}

int partition(int *nums, int indexStart, int indexEnd)
{
    
	int p2 = indexStart-1;
	int p1;
    
	int target = nums[indexEnd];
    
	for (p1 = indexStart; p1 < indexEnd; p1++)
	{
		if (nums[p1] <= target)
		{
			p2++;
			exchange(nums, p1, p2);
			
		}
	}
	exchange(nums, p2+1, indexEnd);
	return p2+1;
}

void exchange(int *nums, int p1, int p2)
{
	int tmp = nums[p1];
	nums[p1] = nums[p2];
	nums[p2] = tmp;
}

void printNums(int *nums, int count)
{
	printf("numbers : ");
	int i;
	for (i = 0; i < count; ++i)
	{
		printf("%4d	", nums[i]);
	}
	printf("
");
}