用汇编语言写的，可以实现较大数的加法运算，带回显得显示结果-Written using assembly language, you can achieve a larger number of addition operations, it is back to show the results of

举例说明BCD数加法、减法过程，及如何求最大数，帮助理解进位位的作业。-Illustrate the BCD number adder, the subtraction process, and how to find the maximum number of jobs to help understand the carry bit.

汇编程序设计，完美实现大数加法，只要输入2个字符串就可得出结果-Assembler design, the perfect realization of the addition of large numbers