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A scientific calculator program that gets infix expressions from input, converts them to postfix and prefix notation, and shows the result by evaluating the postfix expression.

Note: Some of the code here is old and was written when I was learning C++. It might be possible that code is not safe or making wrong assumptions. Please use with caution. Pull requests are always ...

Well I just learned that when I send any mail to a yahoo account, and possibly others, it is put into the bulk mail folder by default. Since most people dont really read what is in there, this is a ...