A variable that never change.

[mestrexx]

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

[KevinWorkman]

When posting code, please use the highlight tags to preserve formatting. You can edit your post and add them now.

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?

[helloworld922]

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.

[mestrexx]

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.

Thank you !!! that was the problem.