3.26上机练习
1.输出x=1,如果是5,输出x=5,如果是 10,输出 x=10,除了以上几个值,都输出x=none。(知识点:if条件语句)
package text1; import java.util.Scanner; public class test14 { public static void main(String[] args) { // TODO Auto-generated method stub //输入变量值x=1输出x=1,x=5--x=5,x=10--x=10,其他输出x=none @SuppressWarnings("resource") Scanner sc=new Scanner(System.in); int x=sc.nextInt(); if(x==1||x==5||x==10) { System.out.println("x="+x); }else { System.out.println("x=none"); } } }
2.用switch结构实现第1题
package text1; import java.util.Scanner; public class test14 { public static void main(String[] args) { // TODO Auto-generated method stub @SuppressWarnings("resource") Scanner sc=new Scanner(System.in); int x=sc.nextInt(); switch(x) { case 1:System.out.println("x=1");break; case 5:System.out.println("x=5");break; case 10:System.out.println("x=10");break; default :System.out.println("x=none");break; } } }
3.判断一个数字是否能被5和6同时整除(打印能被5和6整除),或只能被5整除(打印能被5整 除),或只能被6整除,(打印能被6整除),不能被5或6整除,(打印不能被5或6整除)
package text1; import java.util.Scanner; public class test14 { public static void main(String[] args) { // TODO Auto-generated method stub @SuppressWarnings("resource") Scanner sc=new Scanner(System.in); int x=sc.nextInt(); if(x%5==0&&x%6==0) { System.out.println("能被5和6整除"); }else if(x%5==0&&x%6!=0) { System.out.println("能被5整除"); }else if(x%6==0&&x%5!=0) { System.out.println("能被6整除"); }else if(x%5!=0&&x%6!=0) { System.out.println("不能被5或6整除"); } } }
4.输入一个0~100的分数,如果不是0~100之间,打印分数无效,根据分数等级打印 A(90-100),B(80-89),C,D,E(知识点:条件语句if elseif)
package text1; import java.util.Scanner; public class test14 { public static void main(String[] args) { // TODO Auto-generated method stub //A(90-100),B(80-89),C,D,E @SuppressWarnings("resource") Scanner sc=new Scanner(System.in); int x=sc.nextInt(); if(x>=0&&x<=100) { if(x<=100&&x>=90) { System.out.println("A"); }else if(x<90&&x>=80) { System.out.println("B"); }else if(x<80&&x>=70) { System.out.println("C"); }else if(x<70&&x>=60) { System.out.println("D"); }else if(x<60&&x>=0) { System.out.println("E"); } }else { System.out.println("此分数无效"); } } }
5.输入三个整数x,y,z,请把这三个数由小到大输出(知识点:条件语句)
package text1; import java.util.Scanner; public class test14 { public static void main(String[] args) { // TODO Auto-generated method stub //A(90-100),B(80-89),C,D,E @SuppressWarnings("resource") Scanner sc=new Scanner(System.in); int a=sc.nextInt(); int b=sc.nextInt(); int c=sc.nextInt(); if(a>b&&b>c) { System.out.println(c+"<"+b+"<"+a); }else if(a>b&&b<c) { System.out.println(b+"<"+c+"<"+a); }else if(b>a&&a>c) { System.out.println(c+"<"+a+"<"+b); }else if(b>c&&c>a) { System.out.println(a+"<"+c+"<"+b); }else if(c>a&&a>b) { System.out.println(b+"<"+a+"<"+c); }else if(c>b&&b>a) { System.out.println(a+"<"+b+"<"+c); } } }