MO|fn+BX+2l,0;置文件名字符串的结束标记 LEA DX,fn+2 MOV AX. 3DOOH 21H 打开文件 JNC opened 打开成功转 MOV AH.9 LEA DX.str2 21H ;提示 File not found. JMP finishMOV [fn+BX+2],0 ;置文件名字符串的结束标记 LEA DX,[fn+2] MOV AX,3D00H INT 21H ;打开文件 JNC opened ;打开成功转 MOV AH,9 LEA DX,str2 INT 21H ;提示File not found. JMP finish