耗费一个暑假写的计算器，里面有源代码，是用纯汇编语言书写的，可以进行连续复杂运算。（课设拿了95分），特发到这里，本来也发在其他网站，看下载量巨大，特此分享。-To spend a summer vacation to write a calculator, which source code is written in pure assembly language, can be a continuous complex calculations. (Class set took 95 min