I am using MS Visual C++ 2010. I have written an equation that works fine. There are two additional equations that follow it, each of them using the prior equations answer plus additional input. All of the equations work fine in sequence. What I would like to learn how to do is to program the end of the programming so that if I want to start the program from the beginning again for new calculations I can make it do so without backing completely out of the program and the starting it up again. Thank you for any forthcoming suggestions, John