C++ Homework Assignment

For Begginners!: A friend asked me to help him with his homework, so here is it. This program demonstrates the use of toupper(), isalpha(), how to pass variables across functions, how to read a string from keyboard, how to use a do/while loop, and other little things... Heavily commented, and explained! If you are new to C++, you should see this. All comments are appreciated! .. bye!