leetcode_48题——Rotate Image（矩阵计算）

Rotate Image

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Question Solution

You are given an n x n 2D matrix representing an image.

Rotate the image by 90 degrees (clockwise).

Follow up:
Could you do this in-place?

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Have you met this question in a re

这道题将矩阵先转置，再将每一行进行旋转就可以了

#include<iostream>
#include<algorithm>
#include<vector>
using namespace std;

void rotate(vector<vector<int>>& matrix) {
	int n=matrix.size();
	for(int i=0;i<n;i++)
		for(int j=i;j<n;j++)
		{int temp;temp=matrix[j][i];matrix[j][i]=matrix[i][j];matrix[i][j]=temp;}

		for(int i=0;i<n;i++)
			reverse(matrix[i].begin(),matrix[i].end());
}
int main()
{

}