执行下列程序写出结果(A)=().MOVR2,#04MOVA,#00MOVR1,#01L1：ADDA,R1RLAINCR1DJNER2,L1

Question

执行下列程序写出结果(A)=( ).
MOV R2,#04
MOV A,#00
MOV R1,#01
L1：ADD A,R1
RL A
INC R1
DJNE R2,L1

Answer 1

MOV R2,#04 R2 = 4
MOV A,#00 A = 0
MOV R1,#01 R1 = 1
L1：ADD A,R1 A = 1
RL A A = 2
INC R1 R1 = 2
DJNE R2,L1 R2 = 3
循环：
A = 1 + 2 + 3 + 4 = 10