基于单片机的多功能计算器 本设计采用单片机作为控制芯片，用C语言对其进行编程实现，输入由4*4矩阵式键盘控制，输出采用人性化的12864f型液晶实现。-Microcontroller-based multi-function calculator This design uses the microcontroller as control chip, with its C language programming, input consists of 4* 4 matrix keyboar