Go language, defer con. Close () use one of the

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Defer con. Close ()//can receive the error for the For loop and then exit the connection by default  so that the program does not crash or the program is exited directly for {length, err2: = con. Read (msg) if err2! = nil {addmsg ("Disconnected from server!\n") Return}str = string (Msg[0:length]) out, _: = Iconv. Convertstring (str, "gb2312", "Utf-8") Outte.appendtext ("From:")//addmsg (str) addmsg (out) if str = = "XX" {//addmsg ("00") Con. Write ([]byte (])} else {SF: = strings. Fields (str) Content: = sf[2]contents: = Strings. Split (Content, ":") ID: = Contents[0][1:]word: = "112345678920        8151355839022517280               0" + ID + "#" Outte.appendtext ("To:") addmsg (word) con. Write ([]byte (Word)}}}

As written on the

When the loop is put in the return program will not crash or automatically exit even if the error is not displayed