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thanks uolj, thats what I was looking for. I am using the following to read the file: for (int i = 0; i <= M -1; i++) { for (int j = 0; j <= N -1; j++) { InputFile1 >> imatrix[i][j]; } } and I wanted to test for a...

thanks Kevin

How do I detect end of file when reading from a file. I have tried cin.eof(), but I think this is only for reading from keyboard input. Also, does c++ automatically detect white space when reading files or is it ignored? Thank you all, dnnymak

Great, thanks for the help!!

I am trying to read a .pgm file into an array. The code I was given has the following variable declaration: int **image; what does the "**" mean before image? thanks, Dnnymak

Thanks for the help guys!! dnnymak

Maybe I dont know what a class is. I have been creating classes like functions, which has been a lot of work. I guess a class should be a collection of functions, like a car has wheels, brakes ... I think I am trying to make my car class out of a bunch of little classes. Does that make sense?

Sorry about the confusion, I was using that as an example (I meant cross product). Anyhow, I am taking a computer graphics class and am doing some ray tracing. Therefore I am doing a lot of vector math and am trying to keep it portable by creating classes to do some of the work. I am fairly new...

I am trying to create a class that does a Dot-product; it returns an x, y and z value for a vector. I have implemented it so that I have to call it 3 times to get each value. Very inefficient! Can I return an array from a class? I have been able to read an array into my class, but can't figure...