variable addition to loop

[sanehatter]

Hi There,

I am having this problem with these for loops. Whenever I add "ydisplacement2" to the loop, some results become gibrish. ydisplacement2 will eventually change value through a different loop. These are the loops:

float ydisplacement2 = 0.0, n, n1

for (n = 3 + ydisplacement2; n <= 70; n = n + 5)

 { for (n1 = 4.0 ; n1 <= 39; n1 = n1 + 5) {


}}

Any help will be appreciated.

[Mathhead200]

float ydisplacement2 = 0.0, n, n1 //need a semicolon ;

for (n = 3 + ydisplacement2; n <= 70; n = n + 5) {
//                            can be  n += 5     but whatever
	for (n1 = 4.0 ; n1 <= 39; n1 = n1 + 5) {
	//                        n1 += 5
		//... more code here I assume?
	}
}

sanehatter wrote:

... some results become gibrish.

Can you be more specific?

[zb0S216C]

When you say: some results become gibrish, are you referring to output of any kind?

[sanehatter]

Mathhead200: yes there is more code inside and thanks for the semicolon I have it in the actual code.

Framework and Mathhead200: by gibrish I mean the results (output) alternate from actual real numbers to some "1.#Qnn.."

[Mathhead200]

I don't see anything in your code that looks like it would cause that. Can you post a bit more?

[sanehatter]

Ok just let me be a bit more specific; is the syntax for both loops correct?

[Mathhead200]

Sure. Although, usually a for-loop's variable is an int or some other enumerated data type. Is there a reason you're using float here?

[sanehatter]

Yes I am using float because ydisplacement2 is a float and both n, n1 may become floats at some point.

[zb0S216C]

The only difference between a float and an int in a for loop is precision. It doesn't matter which numerical type you use.

[Mathhead200]

If your not careful you can get weird floating point precision errors. If you only want int's you should use int. However I doubt that's where the problem is. Your for-loops look fine.

[sanehatter]

Thank you Mathhead200 and Framework.