51单片机计算器制作采用LCD1602显示，具有加减乘除等基本运算功能，计算结果保留3位小数！-How to designe the calculator that use the 51IC.Using the keil.

附件代码供学习，使用时更改一下输出口即可，只是实现计算器简单的功能。更多的还请自行更新。(Attachment code for learning, use, change the output port can be, but the realization of the calculator simple function. More please update yourself.)