Question

问题：使用开关盒，编写菜单驱动程序，将温度从华氏温度转换为摄氏温度，反之亦然，以获得错误选项。

我按照以下方式解决了问题：

import java.io.*;
import java.util.*;

class convert {
    public static void main(String arg[]) throws IOException {
        int ch;
        double fah, cel;
        Scanner Sc = new Scanner(System.in);
        System.out.println("MENU");
        System.out.println("1. Fahrenheit to Celsius");
        System.out.println("2. Celsius to Fahrenheit");
        System.out.println("Enter your choice");
        ch = Sc.nextInt();
        switch (ch) {
        case 1:
            System.out.println("enter Fahrenheit values");
            fah = Sc.nextDouble();
            cel = 5.0 / 9.0 * (fah - 32.0);
            System.out.println("Celsius =" + cel);
            break;
        case 2:
            System.out.println("enter Celsius values");
            fah = Sc.nextDouble();
            cel = 1.8 * (fah + 32.0);
            System.out.println("Fahrenheit=" + cel);
            break;
        default:
            System.out.println("vice versa.");
        }
    }
}

我的方法是否正确？请帮忙。

Answer 1

您的代码已格式化并且可编辑...下次使用IDE进行编码...

 import java. io.*;
import java. util.*;

class Main00
{
public static void main(String arg[]) throws IOException
{
int ch;
double fah, cel; 

Scanner Sc= new Scanner (System. in);
System.out.println("MENU");
System.out.println("1. Fahrenheit to Celsius");
System.out.println("2. Celsius to Fahrenheit");
System.out.println("Enter your choice");
ch= Sc.nextInt();
switch (ch)
{
case 1: System.out.print("enter Fahrenheit values");
fah= Sc. nextDouble();
cel=  5.0/9.0*(fah-32.0);
System.out.println("Celsius ="+cel);
break;
case 2 : System.out.print("enter Celsius values");
fah= Sc. nextDouble();
cel=1.8*(fah+32.0);
System.out.println("Fahrenheit="+cel);
break;
default : System.out.println( "vice versa.");
}
}
}

Answer 2

此代码工作正常。此代码中没有问题。唯一的问题是格式问题。

见下面的代码：

 int ch;
   double fah, cel; 
   Scanner Sc= new Scanner (System.in);
   System.out.println("Menu");
   System.out.println("1. Fahrenheit to Celsius");
   System.out.println("2. Celsius to Fahrenheit");
   System.out.println("Enter your choice");
   ch= Sc.nextInt();
   switch (ch)
   {
   case 1: System.out.println("enter Fahrenheit values");
   fah= Sc. nextDouble();
   cel=  5.0/9.0*(fah-32.0);
   System.out.println("Celsius ="+cel);
   break;
   case 2 : System.out.println("enter Celsius values");
   fah= Sc. nextDouble();
   cel=1.8*(fah+32.0);
   System.out.println("Fahrenheit="+cel);
   break;
   default : System.out.println( "vice versa.");

JAVA编程混乱

2 个答案: