说明：  此程序设计了一个多功能计数器，能完成加、减、乘、除、开方、正弦、余弦等了功能。其开发开台是keil、proteus。
(This procedure designed a multi-purpose counters, to complete the add, subtract, multiply, divide, extract a root, sine, cosine, etc. functional. Its development is a Founding keil, proteus.)