
答案
DATA SEGMENT X DB 3 Y DB 5 Z DB ? DATA ENDS CODE SEGMENT ASSUME CS:CODE,DS:DATA START: MOV AX,DATA MOV DS,AX MOV AL,X CMP AL,0 JL SS1 MOV CL,2 SAL AL,CL MOV BL,Y MOV CL,4 SAR BL,CL SUB AL,BL JMP OUT1 SS1: NEG AL OUT1: MOV Z,AL MOV AH,4CH INT 21H CODE ENDS END START