Console app: Making pretty text blocks

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05-29-2009
unit335

Console app: Making pretty text blocks

Hello everyone!

I apologize for not being able to find the answer to this question by myself...but as you can see, I am pretty much a C++ noob.

To practice some C++ I am writing a VERY simple text adventure using beginner-level code and I have quickly found that formatting the text on the screen using cout, \n, and endl is annoyingly cumbersome. The result I want is for lines to be left justified (easily done) and rationally broken at the right of the screen and continued on the next line.

This seems like such a common task that I reckoned it must be a problem tackled frequently with fairly standard functions, or by some other common coding practice...if anyone could tell me (or point me to a resource) how this is done, that would be great! I also realize that I may need to write a function (is parser the correct term?) to break long strings in this way. I know that seems like a simple task for a lot of you, but I wanted to get some answers before I waste my time reinventing the wheel! Of course, since this is a simple text adventure, part of the complication is that certain words in the strings may be char or numeric variables so it seems sensible to do the formatting on-the-fly.

Again, your answer might just be to point me to the standard library where the functions or manipulators or whatever exist that can help me on my way. Many MANY thanks for your help in advance!
05-31-2009
glo

There are several ways to break a line when it reaches the end.
In a default command prompt for example, there are 80 characters in each line. Does that give you any ideas?
05-31-2009
unit335

Well, given that answers to this topic have been slow coming, I will take your clue as a hint to go ahead and write my own algorithm to terminate lines in a pretty way. It won't be hard to throw in a \n based on whether or not the next word makes the line longer than 80 characters. Thank you for pointing out this number, by the way.
05-31-2009
Elysia

There really is no algorithm for this because a) different platforms uses different amount of character length and b) the length of a console/terminal can be customized and the program will never know and c) perhaps too few cares about these problems.
05-31-2009
unit335

Quote:

Originally Posted by Elysia

There really is no algorithm for this because a) different platforms uses different amount of character length and b) the length of a console/terminal can be customized and the program will never know and c) perhaps too few cares about these problems.

Fair enough! That gives me the answer I need. Ty!
05-31-2009
JVene

For c++, boost as a formatting facility that actually works better than printf.

However, in a non-C++ style, printf provides some of the formatting you required - boost is superior for C++ though.

It still doesn't deal with line breaks based on text content. That kind of formatting requires what is probably better called rendering than parsing, though parsing input is required in order to know what to render.

What's just as important to keep in mind, too, is that your solution might be general enough to be reused whenever this comes up in your future work. Developing your own library of code is a good practice.
05-31-2009
unit335

Quote:

Originally Posted by JVene

For c++, boost as a formatting facility that actually works better than printf.

It still doesn't deal with line breaks based on text content. That kind of formatting requires what is probably better called rendering than parsing

What's just as important to keep in mind, too, is that your solution might be general enough to be reused whenever this comes up in your future work. Developing your own library of code is a good practice.

Haha! I actually did come across boost while searching for a solution to my problem...but like you I wasn't convinced it could help me efficiently.

I am actually in the middle of programming a solution to my issue. It has so far been a good experience. While my solution is not yet complete, I am having to learn how to deal well with strings, to recognize ASCII characters, etc. And as you say, it will be a bit of code that I might get some mileage out of. Thanks for your help!