091002122 刘晓梅java

package javaHomework;import java.util.Scanner;public class Test {public static void main(String[] args) {getChoice();}public static void getChoice(){System.out.println("请输入您想要查看的题号1-25：");Scanner input=new Scanner(System.in);int choice=input.nextInt();if(choice>25||choice<1){System.out.println("您输入的题号不正确");}else{switch(choice){case 1:Test1 test1=new Test1();test1.getRabbitNums();break;case 2:Test2 test2=new Test2();test2.getOdds();break;case 3:Test3 test3=new Test3();test3.getFlowerNums();break;case 4:Test4 test4=new Test4();test4.getFactor();break;case 5:Test5 test5=new Test5();test5.getGradeOrder();break;case 6:Test6 test6=new Test6();test6.getNums();break;case 7:Test7 test7=new Test7();test7.getCount();break;case 8:Test8 test8=new Test8();test8.getSum();break;case 9:Test9 test9=new Test9();test9.getPerfect();break;case 10:Test10 test10=new Test10();test10.getHeight();break;case 11:Test11 test11=new Test11();test11.getNumbers();break;case 12:Test12 test12=new Test12();test12.getSalary();break;case 13:Test13 test13=new Test13();test13.getSquarlNums();break;case 14:Test14 test14=new Test14();test14.getDays();break;case 15:Test15 test15=new Test15();test15.getOrders();break;case 16:Test16 test16=new Test16();test16.getTable();break;case 17:Test17 test17=new Test17();test17.getSumNum();break;case 18:Test18 test18=new Test18();test18.getMatchNum();break;case 19:Test19 test19=new Test19();test19.getDiamond();break;case 20:Test20 test20=new Test20();test20.getOrderSum();break;case 21:Test21 test21=new Test21();test21.getSum();break;case 22:Test22 test22=new Test22();test22.getSum();break;case 23:Test23 test23=new Test23();test23.getAge();break;case 24:Test24 test24=new Test24();test24.getLength();break;case 25:Test25 test25=new Test25();test25.recognizeHuiwen();}}}}package javaHomework;public class Test1 {public void getRabbitNums(){System.out.println("第1个月的兔子数是：1");System.out.println("第2个月的兔子数是：1");int f1=1,f2=1,f;for(int i=1;i<=24;i++){f=f2;f2=f2+f1;f1=f;System.out.println("第"+i+"个月的兔子数是："+f2);}}}package javaHomework;public class Test2 {public void getOdds(){int j,n=0;for(int i=101;i<=200;i+=2){int k=(int)Math.sqrt(i);for( j=2;j<=k;j++){if((i%j)==0)break;}if(j>=k+1){System.out.print(i+" ");n++;if(n%4==0)System.out.print("\n");}}System.out.println("\n素数的个数为："+n);}}package javaHomework;public class Test3 {public void getFlowerNums(){int i,hun,ten,data;for(i=100;i<999;i++){hun=i/100;ten=i%100/10;data=i%10;if(i==hun*hun*hun+ten*ten*ten+data*data*data) System.out.println(+i);}}}package javaHomework;import java.util.Scanner;public class Test4 {public void getFactor(){Scanner input=new Scanner(System.in);System.out.println("请输入一个整数：");int Num=input.nextInt();System.out.print(Num+"=");int k =2;while(Num>k){if(Num%k==0){System.out.print(k+"*");Num=Num/k;}else if(Num%k!=0)k++;}System.out.println(k);}}package javaHomework;import java.util.Scanner;public class Test6 {public void getNums(){Scanner input=new Scanner(System.in);System.out.println("请输入两个正整数x和y：");int x=input.nextInt();int y=input.nextInt();//求x和y的最小公倍数int i=0;for(i=(x>y?x:y);i<=x*y;i++){if(i%x==0 && i%y==0)break;}System.out.println("x和y的最小公倍数为"+i);//求最大公约数int j=0;for(j=(x<y?x:y);j>0;j--)if(x%j==0 && y%j==0)break;System.out.println("x和y的最大公约数为"+j);}}package javaHomework;import java.util.Scanner;public class Test7 {public void getCount(){Scanner input= new Scanner(System.in);System.out.println("请输入一串字符");String string = input.nextLine();int strNum = 0; int numberNum = 0;int spaceNum = 0; int othersNum = 0;for(int i=0;i<string.length();i++){if((string.charAt(i)>='a'&&string.charAt(i)<='z')||(string.charAt(i)>='A'&&string. charAt(i)<='Z')){strNum++;} else if(string.charAt(i)>='0'&&string.charAt(i)<='9'){numberNum ++;}else{othersNum++;}}for(int i=0;i<string.length();i++){int index = string.indexOf(' ');if(index!=-1){string = string.substring(index+1);spaceNum++;}}System.out.println("英文字母的个数是"+strNum+"\n"+"数字的个数是"+ numberNum+"\n"+"空格的个数是"+spaceNum+"\n"+"其他字符的个数是"+(othersNum-spaceNum));}}package javaHomework;import java.util.Scanner;public class Test8 {public void getSum(){Scanner input=new Scanner(System.in);System.out.println("请输入a的值");int a = input.nextInt();System.out.println("请输入项的个数n");int n = input.nextInt();int s=0;int sum=0;for(int i=1;i<=n;i++){sum=0;for(int j=1;j<=i;j++){sum=sum+(int)(a*Math.pow(10,j-1));}s=s+sum;}System.out.println("s的值是"+s);}}package javaHomework;public class Test9 {public void getPerfect(){int n,i;for(n=1;n <= 1000;n++){int sum=0;for(i=1;i <= n/2;i++){if(n%i==0)sum+=i;}if(sum==n)System.out.print(n+"\n");}}}package javaHomework;public class Test10 {public void getHeight(){double sum=0;double height=100;int num=1;while(num<=10){sum+=height;height=height/2;num++;}System.out.println("第十次落地时，小球共经过"+sum+"米");System.out.println("第十次反弹的高度是"+height+"米");}}package javaHomework;public class Test11 {public void getNumbers(){int n=0;for(int i=1;i<=4;i++){for(int j=1;j<=4;j++){for(int k=1;k<=4;k++){if(i!=j&&i!=k&&j!=k){System.out.print(i*100+j*10+k+"\t");n++;if(n%4==0){System.out.println();}}}}}}}package javaHomework;import java.util.Scanner;public class Test12 {public void getSalary(){System.out.println("Please enter the interest:");Scanner input=new Scanner(System.in);double interest=input.nextDouble();double salary;if(interest<=10)salary=(1+0.1)*interest;else if(interest>10&& interest<=20)salary=(interest-10)*(1+0.075)+10*(1+0.1);else if(interest>20 && interest<=40)salary=(interest-20)*(1+0.05)+interest;else if(interest>40 && interest<=60)salary=(interest-40)*(1+0.03)+interest;else if(interest>60 && interest<=100)salary=(interest-60)*(1+0.015)+interest;elsesalary=(interest-100)*(1+0.01)+interest;System.out.println("应发放奖金总数为："+salary);}}package javaHomework;public class Test13 {public void getSquarlNums(){System.out.println("满足条件的数是：");for(int i=0;i<10000;i++){if(Math.sqrt(i+100)%1==0 && Math.sqrt(i+100+168)%1==0){ System.out.print(i+"\t");}}}}package javaHomework;import java.util.Scanner;public class Test14 {public void getDays(){Scanner input=new Scanner(System.in);System.out.println("请输入年份");int year=input.nextInt();System.out.println("请输入月份");int month=input.nextInt();System.out.println("请输入日期");int date=input.nextInt();int days=0;for(int i=1;i<month;i++){switch(i){case 1:case 3:case 5:case 7:case 8:case 10:case 12:days+=31;break;case 2:if((year%4==0&&year%100!=0)||(year%400==0)){days+=29;}else{days+=28;}break;default:days+=30;}}days=days+date;System.out.println(year+"年"+month+"月"+date+"日"+"是该年的第"+days+"天");}}package javaHomework;import java.util.Scanner;public class Test15 {public void getOrders(){int t;System.out.println("请输入三个数：x，y，z");Scanner input=new Scanner(System.in);int x = input.nextInt();int y = input.nextInt();int z = input.nextInt();if(x>y){t=x;x=y;y=t;}if(x>z){t=x;x=z;z=t;}if(y>z){t=y;y=z;z=t;}System.out.println("由小到大的顺序为:"+x+","+y+","+z);}}package javaHomework;public class Test16 {public void getTable(){for(int i=1;i<=9;i++){for(int j=1;j<=i;j++){System.out.print(i+"*"+j+"="+(i*j)+"\t");}System.out.println();}}}package javaHomework;public class Test17 {public void getSumNum(){System.out.println(1);int x=1;for(int i=1;i<10;i++){x=2*(x+1);System.out.print(x+" ");}System.out.println("\n第一天总共采摘的桃子数为："+x);}}package javaHomework;public class Test18 {public void getMatchNum(){for(char a='x';a<='z';a++){for(char b='x';b<'z';b++){for(char c='x';c<'z';c++){if((a!=c && b!=c && a!=b) &&( a!='x' && (c!='x' && c!='z'))){System.out.println("三队赛手的名单是：");System.out.println("a VS"+" "+a+"\nb VS"+" "+b+"\nc VS"+" "+c);}}}}}}package javaHomework;public class Test19 {public void getDiamond(){for( int i=0;i<8;i++){if(i<5){for(int k=1;k<5-i;k++){System.out.print(" ");}for(int j=1;j<=2*i-1;j++){System.out.print("*");}System.out.println();}else{for(int n=0;n<=i-5;n++){System.out.print(" ");}for(int m=1;m<=(7-i)*2+1; m++){System.out.print("*");}System.out.println();}}}}package javaHomework;public class Test20 {public void getOrderSum(){double x=2,y=1,temp,term;double sum=0;for(int i=1;i<=20;i++){term=x/y;System.out.println("第"+i+"项是："+term);temp=y;y=x;x=temp+y;sum+=term;}System.out.println("前20项的和是："+sum);}}package javaHomework;public class Test21 {public void getSum(){double i,sum=0;double add=1;for(i=1;i<=20;i++){add*=i;sum+=add;}System.out.println("1到20的阶乘和为：\n"+sum);}}package javaHomework;import java.util.Scanner;public class Test22 {public void getSum(){int i;int sum=1;System.out.println("请输入一个数");Scanner input=new Scanner(System.in);int n=input.nextInt();for(i=1;i<=n;i++){sum*=i;}System.out.println(n+"的阶乘是："+sum);}}package javaHomework;public class Test23 {public void getAge(){int i,age=10;for(i=2;i<=5;i++){age+=2;}System.out.println("第五个人的年龄是"+age);}}package javaHomework;import java.util.Scanner;public class Test24 {public void getLength(){System.out.println("请输入一个不多于5位的正整数");Scanner input = new Scanner(System.in);String num = input.next();System.out.println("这个数是"+num.length()+"位数");System.out.println("逆序输出这个数为：");for(int i=num.length()-1;i>=0;i--){System.out.print(num.charAt(i));}}}package javaHomework;import java.util.Scanner;public class Test25 {public void recognizeHuiwen(){Scanner input = new Scanner(System.in);System.out.println("请输入字符串");String str = input.next();boolean flag=true;for(int i=0;i<str.length();i++){for(int j=str.length()-1;j>=0;j--){if(str.charAt(i)==str.charAt(j)){flag=true;}elseflag=false;}}if(flag){System.out.println("该字符串是回文");}else{System.out.println("该字符串不是回文");}}}。