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Computer Applications

Using a switch case statement, write a menu driven program to convert a given temperature from Fahrenheit to Celsius and vice-versa. For an incorrect choice, an appropriate message should be displayed.

Hint: c = 5/9(f-32) and f=1.8c+32

Java

Java Conditional Stmts

ICSE 2007

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Answer

import java.util.Scanner;

public class KboatTemperature
{
    public static void main(String args[]) {
        Scanner in = new Scanner(System.in);
        System.out.println("Type 1 to convert from Fahrenheit to Celsius");
        System.out.println("Type 2 to convert from Celsius to Fahrenheit");
        int choice = in.nextInt();
        double ft = 0.0, ct = 0.0;

        switch (choice) {
            case 1:
                System.out.print("Enter temperature in Fahrenheit: ");
                ft = in.nextDouble();
                ct = 5 / 9.0 * (ft - 32);
                System.out.println("Temperature in Celsius: " + ct);
                break;

            case 2:
                System.out.print("Enter temperature in Celsius: ");
                ct = in.nextDouble();
                ft = 1.8 * ct + 32;
                System.out.println("Temperature in Fahrenheit: " + ft);
                break;

            default:
                System.out.println("Incorrect Choice");
                break;
        }
    }
}

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Program Explanation

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