[Dev-C++] output screen only gives me what I put in

[<k.a...@at...>]

I need help.  I am a beginner to C++ but I have had experience with unix many years ago.  I am now a teacher and my students want to learn to prgram games.  I am using dev c++ a bata version and we have programed a program called the expensive calculator.  It is a beginner program, it came with a book called beginning C++ game programming.  When we program the source codes we get the output screen but it doesn't calculate anything.  Can you help me?

Also where can I find the meanings of the errors in dev c++?
--
14 Meadowview Drive 
Annandale, New Jersey 08801 
908 735 6640 
k.a...@wo...