Thread: Negative

for some reason when i run my code for fahrenheit to celcius and vise versa when the formula becomes negative it just shows up 0

here is my code

code

import java.util.Scanner;
import java.util.Random;
 
public class tempature
{
	public static void main(String[] args)
	{
	Scanner scan = new Scanner(System.in);
	Random random = new Random();
 
		double c;
		double f;
		int x;
 
		System.out.println("Do you want Celcius(1) or Fahrenheit(2)");
		x = scan.nextInt();
 
 
		if (x == 1){
		System.out.println("type the tempature in Celcius.");
		c = scan.nextInt();
 
		f = (c * 9 / 5 + 32);
 
		System.out.println("Your Fahrenheit tempature is " + f);
		}
		else
{		System.out.println("type the tempature in Fahrenheit.");
		c = scan.nextInt();
 
		f = ((c - 32) * (5 / 9));
 
		System.out.println("Your Celsius tempature is " + f);
 
	}
 
	}
}

The problem is because you're code is using integer math, not floating point math. Try:

import java.util.Scanner;
import java.util.Random;
 
public class tempature
{
	public static void main(String[] args)
	{
	Scanner scan = new Scanner(System.in);
	Random random = new Random();
 
		double c;
		double f;
		int x;
 
		System.out.println("Do you want Celcius(1) or Fahrenheit(2)");
		x = scan.nextInt();
 
 
		if (x == 1){
		System.out.println("type the tempature in Celcius.");
		c = scan.nextInt();
 
		f = (c * 9. / 5. + 32); // need the dot to tell java to treat this number as a floating point constant 
		System.out.println("Your Fahrenheit tempature is " + f);
		}
		else
{		System.out.println("type the tempature in Fahrenheit.");
		c = scan.nextInt();
 
		f = ((c - 32) * (5. / 9.)); // need the dot to tell java to treat this number as a floating point constant 
		System.out.println("Your Celsius tempature is " + f);
 
	}
 
	}
}