import java.util.Scanner;
public class Temperature{
    public static void main(String[]args){
        Scanner sc=new Scanner(System.in);
        System.out.println("1.华氏度转摄氏度");
        System.out.println("2.摄氏度转华氏度");
        System.out.println("请选择1/2");
        int choice=sc.nextInt();
        if (choice==1){
            System.out.print("请输入温度:");
            double c=sc.nextDouble();
            double f=c*9/5+32;
            System.out.printf("%.2f",f);
        }else if(choice==2){
            System.out.print("请输入温度:");
            double c=sc.nextDouble();
            double f=(c-32)*5/9;
            System.out.printf("%.2f",f);
        }
        sc.close();
    }
}