说明： 1、 把非压缩的BCD码3532H转变为压缩的BCD码52H，并输出到屏幕。
2、使用BCD码校正指令，实现两个4位十进制数的加法4678+2556，并把结果输出到屏幕。
(1, the non-compressed into a BCD code 3532H compressed BCD code 52H, and output to the screen. 2, the BCD code of correction commands to achieve two four decimal addition 4678+2556, and the result is output to the screen.)
