Question

我有两个名为A和B的变量用于文件主题和分数如下

A=contents of file 'subject' which contains "English Hindi Telugu"

B=contents of file 'Scores' which contains "60 60 10"

我想用各自的标记标记主题，即

english ==> 60 hindi ==> 60 telugu ===>10

我实现如下，但它显示了奇怪的结果：

English ==> 60 English ==> 60 English ==> 10 Hindi ==> 60 
Hindi ==> 60 Hindi ==> 10 Telugu ==> 60 Telugu ==> 60 Telugu ==> 10

我希望结果如下英文==＆gt; 60印地语==＆gt; 60泰卢固语==＆gt; 10

#!/bin/ksh
A=`cat subject`
B=`cat Scores`
for sub in $A
do
   for score in $B
   do
    echo " $sub ==> $score "
   done
done

Answer 1

如果文件中的单词出现在单独的行中，例如

，这会更容易一些

$ cat subject
English
Hindi
Telugu
$ cat Scores
60
60
10

然后使用一些漂亮的Unix哲学：

$ paste subject Scores | sed 's/\t/ ==> /'
English ==> 60
Hindi ==> 60
Telugu ==> 10

paste实用程序负责打开多个文件并逐行同步读取。

要转换原始文件，请使用以下内容：

$ printf '%s\n' $(cat subject)
English
Hindi
Telugu

Answer 2

我不确定您的实际用例是什么，但您可以定义两个文件描述符并一起阅读并使用printf

一起打印它们

#!/bin/bash

while IFS= read -r subjectVal <&4 && IFS= read -r scoreVal <&3; do
    printf "%s%s\t" "$subjectVal"" ==> ""$scoreVal"   # To have them all in a single-line
  # printf "%s%s\n" "$subjectVal"" ==> ""$scoreVal"   # To print them in new-lines
done 4<subject 3<scores

printf "\n"

以./script.sh运行脚本会产生如下输出： -

English ==> 60  Hindi ==> 60    Telugu ==> 10

在unix shell脚本中嵌套for循环

2 个答案: