Question

书上的一个汇编程序例子，用masm615运行的时候总是出现错误，求解答

DATA SEGMENTNUM DB 86H,34H,21HRESULT DB?DATA ENDSCODE SEGMENT ASSUME CS:CODE,DS:DATASTART: MOV AX,DATA MOV DS,AX LEA SI,NUM LEA DI,RESULT MOV AL,[SI] MOV BL,[SI+1] MUL BL MOV BL,[SI+2] MOV BH,0 SUB AX,BX MOV [DI],AX MOV AH,4CH INT 21HCODE ENDS END START运行过程中出现

Answer 1

RESULT DB?

DB与？之间要空格