Checkerboard program in c

Find centralized, trusted content and collaborate around the technologies you use most. Connect and share knowledge within a single location that is structured and easy to search. Hello I attempting to write a C program that creates an x pixel PGM file and then populates the file with x pixel alternating black and white squares. It compiles fine, freezes when executing, and the resulting PGM file appears to only be a thin alternating black and white line.

You can use fwrite only if you have contiguous data. In your case, you don't. It's not clear to me what you hoped to accomplish from that call.

I removed the call and the output file is a valid PGM file. That only deallocates the memory allocated for the pointers. It does not deallocated the memory the pointers point to.

You need to use:. The following code incorporates the comments, performs appropriate error checking and produces the desired image file. How are we doing? Please help us improve Stack Overflow. Take our short survey. You'll want each square of the board to be shown as the center of a 3 x 3 char square: Code:.

Last edited by Adak; at PM. Replies: 1 Last Post: , PM. Replies: 1 Last Post: , AM. Array coping into another array? Replies: 6 Last Post: , AM. Hint 1A If you were alternating every other row, how could you assign to a boolean variable isOffset given the row number i? Hint 2 If you know what kind of row you're outputting, everything should be easier. Community Bot 1 1 1 silver badge.

I don't understand, I know I should have two sets of logic to get both acol and row identifier, but I don't know how to get there? Another For loop? The logic I'm trying to push you towards is what you'll write inside of the innermost loop. Every loop given the way I'm steering you towards , you'll output exactly 1 character. The question then becomes Kenny Since you already got it your way, let me give you a tip for the future Sign up or log in Sign up using Google.

Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog.

Stack Gives Back It also fixes a bug in the search which could cause the endgame database to malfunction. After making a lot of evaluation improvements in Cake 1.

The result is Cake 1. It's still not in the league of the machine-learned KingsRow, but it's far closer than it used to be. It also fixes a bug in the book access code that could make Cake 1.

Alternatively, you can download the entire current CheckerBoard setup at Ed Gilbert's English checkers website. His latest installers include Cake 1. Since Cake 1.