TITLE MONTH(EXE)DATASEG SEGMENT PARA 'DATA';PARA 'DATA'表示DATA段边界XXX0H开始 THREE DB 3 MONIN DB 3, 4 DUP(?);应该在4与DUP之间有空格才行！ ALFMONTH DB '???','$' MONTHTAB DB 'JAN','FEB','MAR','APR','MAY','JUN' DB 'JUL','AUG','SEP','OCT','NOV','DEC'DATASEG ENDSCODESEG SEGMENT PARA 'CODE' ASSUME DS:DATASEG,CS:CODESEG,ES:DATASEG ;这样写DATA:DATASEG,CODE:CODESEG,EDATA:DATASEG错误！;不能是中文的分号否则有错--------------------------------------------------------------MAIN PROC FAR;顺序弄错了,不是FAR PROC,而是 PROC FAR; PUSH DS SUB AX,AX PUSH AX MOV AX,DATASEG;指向数据段; MOV DS,AX MOV ES,AX CALL INPUT CALL LOCATE CALL DISP RETMAIN ENDP;----------------------------------------------------------------------INPUT PROC NEAR PUSH DX MOV AH,0AH;带缓冲区的键盘输入; LEA DX,MONIN INT 21H；第一个字节是键入的最大字符数，第二个DOS填入实际键入的字符数; MOV AH,MONIN+2;第三个字节之后才是键盘输入的字符; MOV AL,MONIN+3 XOR AX,3030H;ascii码转换成十进制;clear ASCII 3's CMP AH,00H ;moth 01~09? JZ RETURN ;如果在1～9月之间就return; SUB AH,AH ;no,clear AH ADD AL,10;如果AH大于1,表示月份大于9，所以加十;RETURN: POP DX RETINPUT ENDP;------------------------------------------------------------------------LOCATE PROC NEAR PUSH SI PUSH DI PUSH CX LEA SI,MONTHTAB DEC AL ;月份存放在AL当中,(AL-1)*3刚好指向表格首地址 MUL THREE ;3 chars for each month ADD SI,AX ;应该存放在SI当中,因为MOVSB是将DS:SI的数据存放到ES:DI当中; LEA DI,ALFMONTH MOV CX,3 ;init3 chars move CLD ;置方向标志为up或者down; REP MOVSB POP CX;restore registers POP DI POP SI RETLOCATE ENDP;-------------------------------------------------------------------------DISP PROC NEAR PUSH DX LEA DX,ALFMONTH;address of output buffer MOV AH,09H ;display function INT 21H POP DX ;忘记弹出DX寄存器 RETDISP ENDP;------------------------------------------------------------------------------CODESEG ENDS;codeseg写错不能生成目标文件.obj END MAIN
