Introduction - If you have any usage issues, please Google them yourself
This a more beautiful interface calculator source code, function is relatively simple, mainly to achieve a calculator arithmetic function, and there are instructions for use, more suitable for beginners to learn to use, and interested friends can download study. Second, the use of 1, press F1 to view a description, the Enter key to exit instructions. 2, F2 window always on top. 3, F3 unlock/lock the window.