鄭州大學(xué)機(jī)械學(xué)院級微機(jī)原理專業(yè)課程設(shè)計第題軟件設(shè)計答案

47.將字符串補(bǔ)齊為某個特定長度提醒輸入字符串；輸入任意字符串string，點擊Enter結(jié)束輸入；提醒輸入數(shù)字；輸入任意數(shù)字int，點擊Enter結(jié)束輸入；提醒輸入字符；輸入任意字符ch，點擊Enter結(jié)束輸入假如字符串string長度大于int，則截取string前int位輸出；假如字符串string長度小于int，則在string后面添加字符ch，直至使字符串長度等于int；假如字符串string長度等于int，則直接輸出字符串。點擊Enter程序退出DATASEGMENTS1 DB0DH,'ENTERASTRING:$'S2 DB0DH,0AH,'ENTERANUM:$'S3 DB0DH,0AH,'ENTERACHARACTER:$'S4 DB0DH,0AH,'THERESULTIS:$'BUFDB100,0,100DUP(0)N0DB0 ;輸入數(shù)字N1 DB0 ;輸入字符串長度N2 DB0 ;輸入字符DATAENDSCODESEGMENTMAINPROCFARASSUMECS:CODE,DS:DATASTART:PUSHDSXORAX,AXPUSHAXMOVAX,DATAMOVDS,AXMOVAH,9 ;提醒輸入字符串MOVDX,OFFSETS1INT21HMOVAH,0AH ;輸入字符串MOVDX,OFFSETBUFINT21HMOVBX,OFFSETBUF ;保留輸入字符個數(shù)INCBXMOVAL,[BX]MOVN0,ALMOVAH,9 ;提醒輸入數(shù)字MOVDX,OFFSETS2INT21HPUT:MOVAH,07H ;輸入數(shù)字INT21HCMPAL,'0'JBPUTCMPAL,'9'JAPUTMOVDL,ALSUBAL,30HMOVN1,AL ;保留輸入數(shù)字MOVAH,2 ;顯示輸入數(shù)字INT21HMOVAH,07H ;輸入數(shù)字(用不回顯方法)INT21HCMPAL,0DH ;過濾掉數(shù)字外字符JZNEXTNEXT:MOVAH,9 ;提醒輸入字符MOVDX,OFFSETS3INT21HMOVAH,1 ;輸入字符INT21HMOVN2,ALMOVAH,1 ;輸入字符INT21HCMPAL,0DHJZNEXT1 ;保留輸入字符NEXT1:MOVAH,9 ;顯示輸出結(jié)果提醒MOVDX,OFFSETS4INT21HMOVAL,N1 ;輸入數(shù)字MOVAH,N0 ;輸入字符串長度MOVCH,0 MOVCL,N1 MOVBX,OFFSETBUF ADDBX,2 CMPAH,ALJAEEQU1 ;輸入字符串長度>=輸入數(shù)字SUBAL,AH ;需在字符串尾部補(bǔ)充字符個數(shù)MOVCL,AL ;需填充字符個數(shù)ADDBL,N0 ;BX指向字符串尾部MOVAL,N2 ;用輸入字符填充RE_FILL:MOV[BX],ALINCBXLOOPRE_FILLMOVCH,0MOVCL,N1MOVBX,OFFSETBUFADDBX,2EQU1:MOVCH,0MOVCL,N1MOVBX,OFFSETBUFADDBX,2CUT:MOVAH,2MOVDL,[BX]INT21HINCBXLOOPCUTEXIT1:MOVAH