values into array based on coordinates

Hi,

Here is the problem I'm trying to develope some code for, but I need ideas.

I have a data file that contains pairs of numbers that represent coordinates in a 20x20 array. I need to read in these coordinates, and in those coordinates put in the value '1', and all other coordinates must be left empty (or maybe 0 could go there).

I'm sorry I don't have any code or even a good idea of what I can do. I'm really stumped and just need some clues about what direction to go in (I know I need to use a loop of some sort).

Thanks!

Start with the code that creates the 20x20 array, fills it with 0's and outputs it to the screen.

Once you get that code written, compiling successfully, and running, then start on the rest.

The rest will include reading from a file, so a good start would be to open the file. Then you would want to loop through the contents of the file. When you get to that part, if you are having trouble, feel free to ask a question about that specific issue (or any other).