i< =：表达式不完整;更多令牌预期。 KSH [英] i<=: Expression is not complete; more tokens expected. ksh

问题描述

我收到这个错误： i< =：表达式不完整; 这是代码：

i get this error: i<=: Expression is not complete; more tokens expected. This is the code:

vr=`$line`
set sep_mx=`echo $vr | awk '{
    n=split($0,x,"@#;")
    print n
}'`

echo $sep_mx
i=1 && while ((i<=$sep_mx))
do                                       
    echo $vr | awk -v er=$i '{
         n=split($0,x,"@#;")
         print x[er]
    }'
    ((i+=1))
done

任何人都可以帮助我？谢谢

Anyone can help me? Thanks

推荐答案

为了回答原来的问题，错误信息已经
解释错误发生的位置：

To answer the original question, the error message already explains where the error occurs:

在中 i <= $ / code> i <=：表达式未完成; 是扩展（（i <= $ sep_mx））的内容的结果。

In i<= in i<=: Expression is not complete; more tokens expected. is the result of the expansion of the contents of ((i<=$sep_mx)).

如果 $ sep_mx 包含一个空字符串，则这将是

This would happen if $sep_mx contained an empty string, which in turn, would be the consequence of

vr=`$line`

导致一个 vr ，它不包含您在awk行中的split（）函数中包含的分隔符字符串。

resulting in a vr that does not contain the delimiter string you include in the split() function in the awk line.

请注意，awk split（）的第三个参数是正则表达式。如果要拆分@＃;中的任何字符，您应该将其包含在方括号中。

Note that awk split()'s third argument is a regular expression. If you want to split on any of the characters in "@#;", you should turn it into a character set by enclosing it in square brackets.

比较： / p>

Compare:

$ echo "@fee#fie@foe" | awk '{ print split($0,x,"[@#;]") }'
4

With：

$ echo "@fee#fie@foe" | awk '{ print split($0,x,"@#;") }'
1

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