模型机综合设计之一——加减法指令的实现《二》在HKCPT中，输入一段小程序，并且编译、加载到实验平台中，实现普通的加、减法指令。-One integrated design model machine- add and subtract instructions to achieve the　II　in HKCPT, enter a small program, and compile, load to the experimental platform, the achievement of general increases, subtraction instruction.