e3a009fa   
   From: ulrich.eckhardt@dominolaser.com   
      
   Am 13.11.2011 18:06, schrieb Jayden Shui:   
   > I'd like to have an itemized output like   
   >   
   > 1. Topic   
   >      1.1 Sub Topic   
   >      1.2 Sub Topic   
   >            1.2.1 Sub Sub Topic   
   >            1.2.2 Sub Sub Topic   
   >      1.3 Sub Topic   
   > 2. Topic   
   >   
   > and so on.   
   >   
   > The indent is increased when a sub is introduced. My question is that   
   > how can I use stream to handle such-like output?   
      
   You can write spaces at the beginning of a line in order to indent the   
   input, but I guess that's not your question. Since I guess this is   
   homework, I'm also not sure where to stop giving away hints in order not   
   to spoil your exercise.   
      
   Anyhow, the idea is that the beginning of each sub adds one level of   
   indentation and the end removes it again. If you can, bind this to the   
   scope of an object, that way you can't forget the removing call.   
      
   You can store the current level in a simple variable, which must be   
   available to the code doing all the writing inside. There are several   
   ways to store this:   
   1. use a global indent counter   
   2. pass the indent counter by reference to all writing functions   
   3. store the indent counter inside the stream using xalloc/iword   
      
      
   Note that if you need further help, you should try to demonstrate some   
   own effort first, i.e. some specific code. This is because people here   
   generally don't do other people's homework.   
      
   Good luck!   
      
   Uli   
      
      
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