Introduction - If you have any usage issues, please Google them yourself
Calculator is a Windows operating system provides an attachment function, and many people use Visual Basic, Visual C++ such as the preparation of calculators, because these programs provide a control, it is relatively easy to achieve. Turbo C does not control, but we can use it to imitate the function has drawn the interface to achieve the basic functions of calculator to carry out floating-point add, subtract, multiply, divide, modulo involution and demand.