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Accepted
Sashkinzz
Asked:2024-06-02 18:03:12 +0000 UTC2024-06-02 18:03:12 +0000 UTC

关于Linux循环的问题

  • 772

cat $* | while read line 在进入循环之前，您如何理解这是文件中的最后一行，并且在下次运行时将处理脚本的第二个参数？

linux

1 个回答

  1. Best Answer

    您将文件粘在一起，然后尝试将它们分开。嵌套两个循环：

    #!/bin/bash
for f in "$@" ; do
    echo $f
    while IFS= read -r line; do
        echo "| $line"
    done < "$f"
done

    $ ./temp.sh Temp.java temp.sh
Temp.java
| import java.util.*;
| import javax.script.*;
| 
| public class Temp {
|     public static void main(String[] args) throws ScriptException {
|         ScriptEngineManager manager = new ScriptEngineManager();
|         ScriptEngine engine = manager.getEngineByName("JavaScript");
|         String expression = new Scanner(System.in).nextLine(); 
|         System.out.println(engine.eval(expression));
|     } 
| }
temp.sh
| #!/bin/bash
| for f in "$@" ; do
|     echo $f
|     while IFS= read -r line; do
|         echo "| $line"
|     done < "$f"
| done
    • 4

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