快速排序

今天再刷题的时候遇见了一个需要用到快速选择的题目，所以需要写一个快排，但是我发现我竟然忘了。。。
来复习下

#include <stdio.h>
#include <stdlib.h>

void swap(int* nums, int a, int b)
 {
    int t = nums[a]; nums[a] = nums[b]; nums[b] = t; return;
 }

void quick_sort(int* nums, int left, int right)
{
    if(left >= right) return;
    int last = left;
    int i;
    for(i=left+1; i<=right; i++)
    {
        if(nums[i] <= nums[left])
        {
            swap(nums, ++last, i);
        }
    }
    swap(nums, last, left);
    quick_sort(nums, left, last-1);
    quick_sort(nums, last+1, right);
    return;
}

int* sortArray(int* nums, int numsSize){
    quick_sort(nums, 0, numsSize-1);
    int* sorted_nums = malloc(sizeof(int) * numsSize);

    int i;
    for(i=0; i<numsSize; ++i)
    {
        sorted_nums[i] = nums[i];
    }
    return sorted_nums;
}

int main()
{
	int nums[] = {5,1,1,2,0,0};
	int* res = sortArray(nums, 6);
	int i;

	for(i=0; i<6; ++i)
	{
		printf("%d ", res[i]);
	}
	printf("\n");
	return 0;
}