I have added subtraction to my calculator here is the paste bin for it http://pastebin.com/xL1f0BUV I have also learned how to use the float function to make multiple variables instead of just one at a time for example I would have had to put int b() int a() int result but I just put float a,b result tomorrow I will add multiplication but I spent this class learning about how to use the float function and what it is. Here is a screen shot of the calculator in action http://gyazo.com/243ca6c5fc988eb55355a19a290cf4df http://gyazo.com/484b9b425075e356c16a39761ca9b63d