Hi there, I am trying to write some code for parsing string in "p==>q" or "p&&&q" or "p|||r", something like this.But I have trouble in reading operator like"==>""|||"... how can I fix it? I attached my code file with the email.Can some one give me some hints to fix the error and run the code?Thank you in advance!!! _________________________________________________________________ 上Windows Live 中国首页，下载最新版Messenger！ http://www.windowslive.cn