小乔的cc爱cc
花朵
共回答了18个问题采纳率:88.9% 举报
CLR A;A清0
CLR C;C清0
MOV R2, 20H;(20H)->R2
MOV R1, #22H;22H->R1
LOOP: ADDC A, @R1;(A)+(22H)+(C)->A
INC R1;(R1)+1->R1
DJNZ R2, LOOP;(R2)-1不等于0则跳转到LOOP语句
MOV 21H, A;循环结束后(A)-21H
MOV 00H , C;(C)->00H
(21H)= 1B H, (00H)= 1 (00H)是个位单元
1年前
4