prognam SEGMENT
main PROC FAR
ASSUME CS:prognam
start:
PUSH DS
SUB AX,AX
PUSH AX
cctv:
MOV AL,1
INT 21h
CMP AL,'a'
JE exit
JMP cctv
exit:
RET
main ENDP
prognam ENDS
END start
运行时出错!!!!!!!!!
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prognam SEGMENT main PROC FAR ASSUME CS:prognam start: PUSH DS SUB AX,AX PUSH AX cctv: MOV AL,1 INT 21h CMP AL,'a' JE exit JMP cctv exit: RET main ENDP prognam ENDS END start 运行时出错!!!!!!!!!