作业

1.

package mm;

import java.util.Scanner;

public class ll {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int x = scanner.nextInt();
        int y =x*x+3*x+2;
        System.out.println(y);
    }
}

 

 2.

package mm;

import java.util.Scanner;

public class mk {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int r =scanner.nextInt();
        double  pi=3.14;
        double c =2*pi*r;
        double s =pi*r*r;
        System.out.println(c);
        System.out.println(s);


    }
}

 

 3.

package mm;

import java.util.Scanner;

public class nn {
    public static void main(String[] args) {
        Scanner scanner =new Scanner(System.in);
        int n =scanner.nextInt();
        int bai =n/100;
        int shi =n/10%10;
        int ge=n%10;
        System.out.println("百位数是"+bai);
        System.out.println("十位数是"+shi);
        System.out.println("个位数是"+ge);
    }
}

 

 4.

package mm;

import java.util.Scanner;

public class oo4 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入性别");
        String xb =scanner .nextLine();
        System.out.println("请输入体重");
        double tz =scanner.nextDouble();
        int blood = 0;
        if(xb.equals("男")){
            if(tz <= 60){
                blood = 250;
            }else{
                blood = 300;
            }
        }else{
            if(tz <= 50){
                blood = 200;
            }else{
                blood = 250;
            }
        }
        System.out.printf("输血量为%d毫升",blood);

    }
}

 

 5.

package mm;

import java.util.Scanner;

public class oo5 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int x =scanner.nextInt();
        if (x<10){
            System.out.println("制热空调");
        } else if (x > 26) {
            System.out.println("制冷空调");
        }else{
            System.out.println("送风模式");
        }

    }
}

 

 6.

package mm;

import java.util.Scanner;

public class oo6 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入年龄");
    int age =scanner.nextInt();
        System.out.println("请输入身高");
        int sg =scanner.nextInt();
        System.out.println("请输入票价类型");
        String x =scanner.next();
        if (age<18){
        if (sg<120){
            System.out.println("票价免费");
        }else if (120<=sg&&sg<150&&x.equals("硬座")){
            System.out.println(100/2);
        }else if (120<=sg&&sg<150&&x.equals("卧铺")){
            int qian =190-100/2;
            System.out.println(qian);
        }else if (x.equals("卧铺")){
            System.out.println(190);
        }else if (x.equals("硬座")){
            System.out.println(100);
        }

    }else {if(x.equals("卧铺")
           System.out.println(190);
              else System.out.println(100);
}
            
        }
        }

}

 

 7.

package mm;

import java.util.Scanner;

public class oo7 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int x =scanner.nextInt();
        if (x<=150){
             double z =x*0.4463;
            System.out.println(z);
        }else if (x>150&&x<=400){
            double z =x*0.4663;
            System.out.println(z);
        }else{
            double z =x*0.5663;
            System.out.println(z);
        }


    }
}

 

 8.

package mm;

import java.util.Scanner;

public class oo8 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int x =scanner.nextInt();
        switch (x){
            case 1:
            case 12 :
            case 2:
                System.out.println("冬季");
                break;
            case 3:
            case 4:
            case 5:
                System.out.println("春季");
                break;
            case 6:
            case 7:
            case 8:
                System.out.println("夏");
                break;
            case 9:
            case 10:
            case 11:
                System.out.println("秋");
        }
    }
}

 

 9.

package mm;

public class oo9 {
    public static void main(String[] args) {
        int x =560;
        int s = 560/60;
        int m=560%60;
        System.out.println(s+"小时"+m+"分钟");
    }
}

 

 10.

package mm;

import java.util.Scanner;

public class oo10 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int a =scanner.nextInt();
        int b =scanner.nextInt();
        int c =scanner.nextInt();
        int z =a;
        a =c;
        c=b;
        b=z;

        System.out.println(a);
        System.out.println(b);
        System.out.println(c);
    }
}