1.题目要求:

2.题目代码:

class Solution {
public:
    vector<vector<int>> transpose(vector<vector<int>>& matrix) {
    	//把matrix的行变成result的列，把matrix的列变成result的行
        vector<vector<int>> result;
        result.resize(matrix[0].size());
        for(int i = 0;i < matrix[0].size();i++){
            result[i].resize(matrix.size());
        }
        int f = 0;
        for(int j = 0;j < matrix[0].size();j++){
            int index = 0;
            for(int i = 0;i < matrix.size();i++){
                result[f][index] = matrix[i][j];
                index++;
            }
            f++;
        }
        return result;
    }
};