说明：  汇编语言，假设从变量Buff开始存放了13个字，编写一个程序统计出其正数、0和负数的个数，并把它们分别存入N1,N2和N3中，吴泽乐
(Assembly language, assumed from the beginning Buff variables stored in 13 words, write a program out of its positive statistics, the number 0 and negative numbers, and put them separately into N1, N2 and N3, the WU Ze-Le)