修改下列代码，要求：改为如果字符串2长度大于等于字符串1,则输出字符串1,如果字符串2长度小于字符串1，则补齐字符串2长度到字符串1,补足部分XXXX.DATA SEGMENT TIP1 DB 0DH,0AH, 'PLEASE INPUT STRING1 END BY ENTER:' ,'$' TIP2 DB 0DH,0AH, 'PLEASE INPUT STRING1 END BY ENTER:' ,'$' TIP3 DB 0DH,0AH, 'MATCH','$' TIP4 DB 0DH,0AH, 'NOT MATCH','$' TIP5 DB 0DH,0AH, 'PRESS ENTER TO EXIT ','$' BUFF1 DB 101,0,101 DUP(0) BUFF2 DB 101,0,101 DUP(0) DATA ENDS CODE SEGMENT ASSUME CS:CODE,DS:DATA START: MOV AX,DATA MOV DS,AX MOV ES,AX;数据段和堆栈段初始化 LEA DX,TIP1 MOV AH,9 INT 21H;DISPLAY TIP1 LEA DX,BUFF1 MOV AH,0AH INT 21H;输入第一个字符串到BUFF1缓冲区 LEA DX,TIP2 MOV AH,9 INT 21H LEA DX,BUFF2 MOV AH,0AH INT 21H;输入第二个字符串到BUFF2缓冲区 LEA SI,BUFF1;第一个字符串首址给SI LEA DI,BUFF2;第二个字符串首址给DI MOV CX,53 CLD;地址递增 REPZ CMPSB;字符串比较 JZ MATCH;相等输出MATCH LEA DX,TIP4 MOV AH,9 INT 21H;不等输出NOT MATCH JMP EXIT MATCH: LEA DX,TIP3 MOV AH,9 INT 21H;DISPLAY TIP1 JMP EXIT EXIT: LEA DX,TIP5 MOV AH,9 INT 21H MOV AH,1 INT 21H CMP AL,13 JZ AA JMP START AA: MOV AH,4CH INT 21H CODE ENDS END START

修改后的代码如下：

DATA    SEGMENT         
        TIP1   DB  0DH,0AH, 'PLEASE INPUT STRING1 END BY ENTER:' ,'$'         
        TIP2   DB  0DH,0AH, 'PLEASE INPUT STRING2 END BY ENTER:' ,'$'         
        TIP3   DB  0DH,0AH, 'MATCH','$'         
        TIP4   DB  0DH,0AH, 'NOT MATCH','$'         
        TIP5   DB  0DH,0AH, 'PRESS ENTER TO EXIT      ','$'          
        BUFF1  DB  101,0,101 DUP(0)         
        BUFF2  DB  101,0,101 DUP(0) 
DATA    ENDS  

CODE    SEGMENT         
        ASSUME  CS:CODE,DS:DATA          
START:  
        MOV AX,DATA         
        MOV DS,AX         
        MOV ES,AX;数据段和堆栈段初始化                        
        LEA DX,TIP1                      
        MOV AH,9         
        INT 21H;DISPLAY TIP1         
        LEA DX,BUFF1         
        MOV AH,0AH         
        INT 21H;输入第一个字符串到BUFF1缓冲区                  
        LEA DX,TIP2         
        MOV AH,9         
        INT 21H         
        LEA DX,BUFF2         
        MOV AH,0AH         
        INT 21H;输入第二个字符串到BUFF2缓冲区 

        ;如果字符串2长度大于等于字符串1，则输出字符串1
        LEA SI,BUFF1;第一个字符串首址给SI
        LEA DI,BUFF2;第二个字符串首址给DI
        MOV CX,53
        CLD;地址递增
        REPZ CMPSB;字符串比较
        JNC MATCH;大于等于则相等，输出MATCH

        ;如果字符串2长度小于字符串1，则补齐字符串2长度到字符串1
        LEA SI,BUFF2
        LEA DI,BUFF1
        MOV CX,53
        CLD
        REP MOVSB

        ;比较两个字符串是否相等
        LEA SI,BUFF1
        LEA DI,BUFF2
        MOV CX,53
        CLD
        REPZ CMPSB
        JZ  MATCH;相等输出MATCH

        LEA DX,TIP4         
        MOV AH,9         
        INT 21H;不等输出NOT MATCH         
        JMP EXIT         

MATCH:  
        LEA DX,TIP3         
        MOV AH,9         
        INT 21H;DISPLAY TIP1         
        JMP EXIT 

EXIT:   
        LEA DX,TIP5         
        MOV AH,9         
        INT 21H         
        MOV AH,1         
        INT 21H         
        CMP AL,13         
        JZ  AA         
        JMP START 

AA:     
        MOV AH,4CH         
        INT 21H	 
CODE    ENDS         
END     START