BASH的IO操作

[yuffey]

Bash从控制台和文件中输入时，有点不一样喽，看看例子就明白。。

从文件中输入输出

more data_file
1 2 45
33
44

代码： 全选

# Read from data file: 
echo "Numbers are in one line space separated:" 
read a b c < data_file 
echo a = $a 
echo b = $b 
echo c = $c


echo "Numbers are stored one per line:" 
{ 
       read a 
       read b 
       read c } < data_file 
echo a = $a 
echo b = $b 
echo c = $c

• Numbers are in one line space separated:
  a = 1
  b = 2
  c = 45
  Numbers are stored one per line:
  a = 1 2 45
  b = 33
  c = 44

[yuffey]

得出的结果是：
Read是分行读入变量，那么变量赋值就是分行得，否则就不是。