> For the complete documentation index, see [llms.txt](https://dfine.gitbook.io/leetcode/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dfine.gitbook.io/leetcode/867.transpose.md).

# 867.transpose

**867.转置矩阵**

难度：Easy

> 给定一个矩阵 A， 返回 A 的转置矩阵。

矩阵的转置是指将矩阵的主对角线翻转，交换矩阵的行索引与列索引。

```
示例 1：

输入：[[1,2,3],[4,5,6],[7,8,9]]
输出：[[1,4,7],[2,5,8],[3,6,9]]
示例 2：

输入：[[1,2,3],[4,5,6]]
输出：[[1,4],[2,5],[3,6]]
 

提示：

1 <= A.length <= 1000
1 <= A[0].length <= 1000
```

这题题目不难，首先是获取向量A的行列，然后行列转置新建向量，并交换行列赋值即可。

```
class Solution {
public:
    vector<vector<int>> transpose(vector<vector<int>>& A) {

        int r,c;
        r= A.size();
        c= A[0].size();
        vector<vector<int>> trans(c,vector<int>(r,0));
        for(int i=0;i<c;i++)
        {

            for (int j=0;j<r;j++)
            {
                trans[i][j]=A[j][i];
            }

    }
        return trans;
    }
};
```


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