顺时针打印矩阵

来源：互联网发布：英汉双语阅读软件编辑：程序博客网时间：2024/05/23 16:55

题目描述
输入一个矩阵，按照从外向里以顺时针的顺序依次打印出每一个数字，例如，如果输入如下矩阵： 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 则依次打印出数字1,2,3,4,8,12,16,15,14,13,9,5,6,7,11,10.

class Solution {public:    vector<int> printMatrix(vector<vector<int> > matrix) {        if(matrix.size()==0)            return vector<int>{};        int n=matrix.size();        int m=matrix[0].size();        vector<int> res{};        int index=0;        while(index<=n&&index<=m)            {            vector<int> temp= print(matrix,index,m-1,n-1);            res.insert(res.end(),temp.begin(),temp.end());            ++index;            --n;            --m;        }        return res;            }    vector<int> print(vector<vector<int> > matrix,int index,int right,int bottom)        {        vector<int> res;        if(index==right&&index<=bottom){            int temp=index;            while(temp<=bottom){            res.push_back(matrix[temp++][index]);            }            }        else if(index<right&&index==bottom)            {            int temp=index;            while(temp<=right){            res.push_back(matrix[index][temp++]);            }        }        else if(index<right&&index<bottom)            {            int i=index;            int j=index;            while(j<right)                                   res.push_back(matrix[i][j++]);            while(i<bottom)                res.push_back(matrix[i++][j]);            while(j>index)                res.push_back(matrix[i][j--]);            while(i>index)                res.push_back(matrix[i--][j]);            }        return res;    }};

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