Q&A for How to Create a Calculator in C++

Code is too long to put here. Try asking the question on stackoverflow, where people have the space to write out code. I suggest (if you're really passionate) you learn C++ and make the code yourself. It won't be a hard code (some people write one as they learn C++).

Press the S-to-D button, or just put a 0 at the end.

Yes. C++ is a very good language to create a game in. Although it will be more difficult than a language like Java, it will be much faster and more efficient.

Yes, you can. Especially if you learn similar languages (like C and C++ at once). But try to put all your focus on getting them right.