c++课程设计，一个简单的计算器代码，只有简单的运算功能-c++ curriculum design, a simple calculator code, only of simple arithmetic functions

计算器的界面设计，仿照windows自带的计算器。-Calculator interface design, modeled on the calculator that comes with windows.

第二章 设计思路 2.1 设计总体框图 有分析可知，本次课程设计可以分成五个木块来实现相应的功能，分别是输入模块，计算模块，扫描模块，输出模块以及显示模块。((Calculator design based on FPGA DE2 development board. language use Verilog. Matrix keyboard input, LCD1602 display. Program includes key scanning module and LCD modul