Writing Log Records To A Log File

[vermarajeev]

Qt has no portable logging facility (I think). Just write your logfile yourself.

QFile file("out.txt");
     if (!file.open(QIODevice::Append | QIODevice::WriteOnly | QIODevice::Text))
         return;
 
     QTextStream out(&file);
     out << "The magic number is: " << 49 << "\n";

QFile file("out.txt");
     if (!file.open(QIODevice::Append | QIODevice::WriteOnly | QIODevice::Text))
         return;

     QTextStream out(&file);
     out << "The magic number is: " << 49 << "\n";

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But that is not I want. If there is any error in my application (suppose some crash or some error) I want to know in which file, at what line, what made to cause that problem etc etc and all these information will be stored in log file.

There is something called __FILE__, __LINE__ which can help me. This gives me information about what file and which line. I want something organized.

If any error occurs, I should know where the error has occured by just seeing the log file. I know in Java but how can implement the same using Qt or plain C++. Any help????

Thanks