遍历文件夹目录下的文件并打印
#!/bin/bash

for file in ./*
do
    if [ -f "$file"]
    then
        echo file is $file
        cat $file
    fi
done

将程序运行结果写入到另一个文件
#!/bin/bash

for file in ./*
do
    if [ -d "$file"]
    then
        echo file: $file is a dir.
    elif [ -f "$file" ]
    then
        echo file: $file is a file.
    fi
done > result.txt