# 194. Transpose File

**<font color=red>难度: Medium</font>**

## 刷题内容

> 原题连接

* https://leetcode.com/problems/transpose-file/

> 内容描述

```
Given a text file file.txt, transpose its content.

You may assume that each row has the same number of columns and each field is separated by the ' ' character.

Example:

If file.txt has the following content:

name age
alice 21
ryan 30
Output the following:

name alice ryan
age 21 30
```

## 解题方案

> 思路 1

参考[illuz](https://leetcode.com/problems/transpose-file/discuss/55502/AC-solution-using-awk-and-statement-just-like-C.)

```shell
awk '
{
    for (i = 1; i <= NF; i++) {
        if(NR == 1) {
            s[i] = $i;
        } else {
            s[i] = s[i] " " $i;
        }
    }
}
END {
    for (i = 1; s[i] != ""; i++) {
        print s[i];
    }
}' file.txt
```
