Problem with division using doubles

[chrismanahan]

Hey guys,
I'm working on a project in my beginner Java class and the only thing that is not working is division. I feel like it might just be something really simple I can't see, but every time I divide two numbers and assign it to a double, the answer truncates itself like an int and loses all values that aren't whole numbers. Here for example, is a program that converts fahrenheit to celsius:

public class test
{
	public static void main(String [] args)
	{
		double c;
		double boil = 212;
		String output;

		c = (boil - 32) * (5/9);
		output = boil + " in Fahrenheit is " + c + " in Celsius.";
		System.out.println(output);
       }
}

This outputs c = 0 for me because the problem is the 5/9. Instead of being .556, it truncates and is 0.


This code below doe the same thing except instead of using (5/9), I assign the values 5 and 9 to two double vars called one and two, divide, and get the correct answer.

public class test
{
	public static void main(String [] args)
	{
		double one, two;
		double c;
		double boil = 212;
		String output;

	        one = 5;
		two = 9;
		c = (boil - 32) * (one / two);
		output = boil + " in Fahrenheit is " + c + " in Celsius.";
		System.out.println(output);
       }
}

Please help me out! I worked on this for 4 hours last night and couldn't figure out what is wrong

[Fubarable]

make it 5.0/9.0 so that you don't inadvertently do int division here.

[chrismanahan]

Oh my god thanks dude. You're a savior

[Fubarable]

Oh my god thanks dude. You're a savior

No, I'm just one who has tripped over this problem himself in the past. Good luck.