目录前言一、什么是goto语句二、goto语句的作用是什么三、goto语句的缺点四、goto语句的结构与用法五、goto语句的巧用实例——关机小程序总结撒花前言
I have to extract columns from a text file explained in this post: Extracting columns from text file using Perl one-liner: similar to Unix cut
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