pep9

pep9

编写一个伪代码算法，读入三个值，输出它们的和。

我使用了循环语句

Set sum to 0
Set counter to 0
Set limit to number of values to sum
While(counter<limit)
    Read num
    Set sum to sum+num
    Set counter to counter+1
Write sum

用pep/9机器指令实现上述算法

12 00 0B 00 00 00 00 00 00 00 00 31 00 09 31 00
07 C1 00 03 61 00 07 E1 00 03 C1 00 05 60 00 01
E1 00 05 A1 00 09 18 00 2C 12 00 0E 39 00 03 00
zz

用pep/9汇编语言实现上述算法

   BR      main
sum:     .WORD   0x0000
counter: .WORD   0x0000
num:     .BLOCK  2
limit:   .BLOCK  2           

main:    DECI    limit,d

loop:    DECI    num,d
         LDWA    sum,d
         ADDA    num,d
         STWA    sum,d
         LDWA    counter,d
         ADDA    1,i
         STWA    counter,d
         CPWA    limit,d
         BREQ    finish
         BR      loop;

finish:  DECO    sum,d
         STOP    
         .END

posted @ 2021-10-25 11:05  20211408王其  阅读(1046)  评论(1)  编辑  收藏  举报