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1、1、從鍵盤輸入一個正整數(shù)，按數(shù)字的相反順序輸出。packagecom.my.ccit;importjava.util.Scanner;publicclassa1{publicstaticvoidmain(String[]args){Scanners=newScanner(System.in);intm=s.nextInt();intsum=0;intn;while(m!=0){n=m%10;m=m/10;sum=sum*10+n;}System.out.println(sum);}}2、寫一條for語句，計數(shù)條件為n從100~200，步長為2；然后再用while語句實現(xiàn)同樣的
2、循環(huán)。packagecom.my.ccit;publicclassa2{publicstaticvoidmain(String[]args){intn;for(n=100;n<=200;n=n+2){System.out.println(n);}}otherstaffoftheCentre.Duringthewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWe
3、stNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofStateenterprisesMinister,ShenmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersand}3、編寫一段程序，運行時向用戶
4、提問“你考了多少分？（0~100）”，接受輸入后判斷其等級并顯示出來。判斷依據(jù)如下：等級={優(yōu)（90~100分）；良（80~89分）；中（60~69分）；差（0~59分）；}packagecom.my.ccit;importjava.util.Scanner;publicclassa3{publicstaticvoidmain(String[]args){Scanners=newScanner(System.in);intm=s.nextInt();if(m>=90&&m<=100){System.out.println("優(yōu)");}elseif(m>=80){System.
5、out.println("良");}elseif(m>=70){System.out.println("中");}elseif(m>=60){System.out.println("及格");}else{System.out.println("差");}}}4、使用for循環(huán)語句求出1~100之間的質(zhì)數(shù)。packagecom.my.ccit;publicclassa4{/***@paramargs*/publicstaticvoidmain(String[]args){//TODOAuto-generatedmethodotherstaffoftheCentre.During
6、thewar,ZhuwastransferredbacktoJiangxi,andDirectorofthenewOfficeinJingdezhen,JiangxiCommitteeSecretary.Startingin1939servedasrecorderoftheWestNorthOrganization,SecretaryoftheSpecialCommitteeAfterthevictoryofthelongMarch,hehasbeentheNorthwestOfficeoftheFederationofStateenterprisesMinister,She
7、nmufuguSARmissions,DirectorofNingxiaCountypartyCommitteeSecretaryandrecorderoftheCountypartyCommitteeSecretary,Ministersandstub4、使用for循環(huán)語句求出1~100之間的質(zhì)數(shù)。intn;intj;booleanflag=false;for(n=1;n<=100;n++){for(j=2;j<=n-1;j++){if(n%j==0){flag=false;break;}else{f
