Thread: A variable that never change.

Hi.

I have an issue with my code:

public class BuildBridge {
 
	public static void main(String[] args) {
 
		BuildBridge cartas = new BuildBridge();
 
		int res = cartas.howManyCards(1,1);
 
		System.out.print(res);
 
 
	}
 
	public int howManyCards(int d, int l) {
 
		int results = 0;
		double middle = l/2;
		double increment = 0.0;
 
		while (middle + increment < d) {
 
 
			++results;
			increment += middle / results; //
 
 
		} 
 
		return results;
	}
 
}

The "increment" and "middle" variables are always zero, never change, even "middle" after the asignation "= l / 2". Only the variable "results" change when the while loop comes.

Hope you can help, me.

Thanks, have a nice day.


Eclipse Standard/SDK

Version: Kepler Release
Build id: 20130614-0229

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Have you stepped through this with a debugger, or at least added print statements, to figure out what's going on? When exactly does the code execution differ from what you expect?

You're relying on integer math to calculate middle. You need to be using floating point math.

The easiest way is to add a decimal to the 2.