(lleetcode)Merge Sorted Array

Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array.

Note:
You may assume that nums1 has enough space (size that is greater or equal to m + n) to hold additional elements from nums2. The number of elements initialized in nums1and nums2 are m and n respectively.

使用快排进行排序：

class Solution {
public:

void quicksort(vector<int>& a,int left,int right)
{
if(left>right)
return;
int piv = a[left];
int i = left;
int j = right;

while(i!=j)
{
//从右边开始
while(a[j] >= piv && i < j)
j--;
while(a[i] <= piv && i < j)
i++;

if(i<j)
{
/*int t = a[i];
a[i]=a[j];
a[j]=t;*/
swap(a[i],a[j]);
}
}
a[left] = a[i];
a[i] = piv;

quicksort(a,left,i-1);
quicksort(a,i+1,right);
}
void merge(vector<int>& nums1, int m, vector<int>& nums2, int n) {
int i,j;
for(i = m,j=0;i<m+n;++i)
{
nums1[i] = nums2[j++];
}
quicksort(nums1,0,m+n-1);
}
};