1.编写程序, 输
package aa; import java.util.Scanner; public class text { public static void main(String[] args) { System.out.println("请输入x的值:"); Scanner input=new Scanner(System.in); int x=input.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 aa; import java.util.Scanner; public class text { public static void main(String[] args) { System.out.println("请输入x的值:"); Scanner input=new Scanner(System.in); int x=input.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"); } } }
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 aa; import java.util.Scanner; public class text { public static void main(String[] args) { System.out.println("请输入一个数:"); Scanner input=new Scanner(System.in); int x=input.nextInt(); if(x%5==0&&x%6==0){ System.out.println("能被5和6整除"); }else if(x%6==0&&x%5!=0){ System.out.println("只能被6整除"); }else if(x%5==0&&x%6!=0){ System.out.println("只能被5整除"); }else{ 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 aa; import java.util.Scanner; public class text { public static void main(String[] args) { System.out.println("请输入分数:"); Scanner input=new Scanner(System.in); int x=input.nextInt(); if(x>=90){ System.out.println("A"); }else if(x>=80){ System.out.println("B"); }else if(x>=70){ System.out.println("C"); }else if(x>=60){ System.out.println("D"); }else{ System.out.println("E"); } } }
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 aa; import java.util.Scanner; public class text { public static void main(String[] args) { System.out.println("请输三个整数:"); Scanner input=new Scanner(System.in); int x=input.nextInt(); int y=input.nextInt(); int z=input.nextInt(); if(x>y){ if(z>y){ System.out.println(y+","+x+","+z); }else if(z<y){ System.out.println(z+","+y+","+x); }else{ System.out.println(y+","+z+","+x); } }else{ if(z<x){ System.out.println(z+","+x+","+y); }else if(z>y){ System.out.println(x+","+y+","+z); }else{ System.out.println(x+","+z+","+y); } } } }
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)