I am a beginner in C++ and I was trying to write a program that finds the average of two numbers, but when I run the program, the window disappears without allowing me to se
I always hated that...I always find the easiest to be system("pause"); right before you return, but that's not a portable solution (cin.get is though). There are many other ways as well, some of which are mentioned in the link below.
http://social.msdn.microsoft.com/Forums/en-US/Vsexpressvc/thread/1555ce45-8313-4669-a31e-b95b5d28c787
Edit: system("pause"); is terrible, should never be used, and may or may not end life on this planet as we know it, even if by a beginner in a project called 'Hello'. Using system("pause") is expensive and dangerous, and if you use it, you'll never see anyone you love again. Don't do it. Use cin.get or something else.