1.编写程序, 输入变量x的值,如果是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 kkkkkkkk; import java.util.Scanner; public class rrrr { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input =new Scanner(System.in); System.out.println("输入X"); int x=input.nextInt(); if (x==1) { System.out.println("1"); } else if(x==5){ System.out.println("5"); } else if(x==10){ System.out.println("10"); } else{ System.out.println("none"); } } }
2.用switch结构实现第1题
package kkkkkkkk; import java.util.Scanner; public class rrrr { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input =new Scanner(System.in); System.out.println("输入X"); int x=input.nextInt(); switch (x) { case 1:System.out.println("1"); break; case 5:System.out.println("5"); break; case 10:System.out.println("10"); break; default:System.out.println("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 kkkkkkkk; import java.util.Scanner; public class rrrr { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input =new Scanner(System.in); System.out.println("输入X"); int x=input.nextInt(); if (x%5==0&&x%6==0) { System.out.println("能被5和6整除"); } else if(x%5==0) { System.out.println("能被5整除");} else if(x%6==0){ System.out.println("能被6整除"); }else{ System.out.println("不成立"); } } }
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 kkkkkkkk; import java.util.Scanner; public class rrrr { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input =new Scanner(System.in); System.out.println("输入成绩X"); int x=input.nextInt(); switch (x/10) { case 10: case 9: System.out.println("A");break; case 8: System.out.println("B");break; case 7: System.out.println("c");break; case 6: System.out.println("D");break; case 5: System.out.println("E");break; default:System.out.println("不成立"); break; } } }
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 kkkkkkkk; import java.util.Scanner; public class rrrr { public static void main(String[] args) { // TODO Auto-generated method stub Scanner input =new Scanner(System.in); int x=0,y=0,z=0; System.out.println("输入三个数"); x=input.nextInt(); y=input.nextInt(); z=input.nextInt(); int min=x; if(x>y){int r=x;x=y;y=r;} if(x>z){int r=x;x=z;z=r;} if(y>z){ System.out.println(x+"<"+z+"<"+y); }else{System.out.println(x+"<"+y+"<"+z); } } }