1. 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
![复制代码](https://common.cnblogs.com/images/copycode.gif)
package hgj;
import java.util.Scanner;
public class dfg {
public static void main(String[] args) {
Scanner input= new Scanner(System.in);
System.out.println("请输入x的值");
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结构写第1题
package huaerzi;
import java.util.Scanner;
public class huada {
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner huaer= new Scanner(System.in);
System.out.println("请输入a的值");
int a=huaer.nextInt();
switch(a) {
case 1:
case 5:
case 10:
System.out.println("a="+a);break;
default:
System.out.println("a=none");
System.out.println("a=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 hgj;
import java.util.Scanner;
public class dfg {
public static void main(String[] args) {
Scanner input= new Scanner(System.in);
System.out.println("请输入这个数的值");
int x=input.nextInt();
if(x%5==0 && x%6==0) {
System.out.println(x+"能被5和6整除");
}else if(x%5==0 ){
System.out.println(x+"能被5整除");
}else if(x%6==0) {
System.out.println(x+"能被6整除");
}else {
System.out.println(x+"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
package huaerzi;
import java.util.Scanner;
public class huada {
public static void main(String[] args) {
// TODO Auto-generated method stub
System.out.println("请输入一个整数");
Scanner scanner = new Scanner(System.in);
int grade = scanner.nextInt();
if ((grade>100)||(grade<0)) {
System.out.println("无效");
} else if ((grade>=80)&&(grade<90)) {
System.out.println("B");
} else if ((grade>=90)&&(grade<=100)) {
System.out.println("A");
} else if ((grade>=70)&&(grade<80)){
System.out.println("C");
} else if ((grade>=60)&&(grade<70)){
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 xx;
import java.util.Scanner;
public class pika {
public static void main(String[] args) {
Scanner sc= new Scanner(System.in);
System.out.println("请输入x的值");
int x=sc.nextInt();
System.out.println("请输入y的值");
int y=sc.nextInt();
System.out.println("请输入z的值");
int z=sc.nextInt();
if(x>y && y>z) {
System.out.println("输出"+z+","+y+","+x);
}else if(x>z && z>y) {
System.out.println("输出"+y+","+z+","+x);
}else if(y>x && x>z) {
System.out.println("输出"+z+","+x+","+y);
}else if(y>z && z>x) {
System.out.println("输出"+x+","+z+","+y);
}else if(z>y && y>x) {
System.out.println("输出"+x+","+y+","+z);
}else if(z>x && x>y) {
System.out.println("输出"+y+","+x+","+z);
}
}
}