ID# 173 (19/20)
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The blue line in your PPM file was at the bottom of the image instead of on the left side.



ID# 292 (15/20)
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Part 2: The blue line in your PPM file was in the wrong place.
Part 3: Some of the necessary code is there, but there's quite a bit missing.



ID# 515 (18/20)
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There's a small C++ problem with your PPM program. You've got this chunk of code:

// Ask for filename
char *filename;
cout << "Write the name of the file to save" << endl;
cin >> filename;

You've declared filename to be a char pointer, but it doesn't actually point to anything. 
So when I tried to run your program, it crashed when I entered the filename, because your 
code was trying to save the filename in some unknown chunk of memory that it wasn't allowed 
to write to. It's an easy fix: instead of declaring filename as a char*, do something like 
this:  ``char filename[50];''  Then everything works great (although the PPM output is 
missing the blue line on the left).



ID# 535 (17/20)
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Part 2: The red line in your PPM file isn't outputting correctly - instead of the top row being red, the top two rows are alternately red and then random.
Part 3: The clicks and releases aren't getting detected properly: the first click produces no messages, and after that the clicks are reported as releases and vice versa.



ID# 550 (19/20)
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The top line in your PPM image should be red, not blue.



ID# 594 (15/20)
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The source code for the second part of the project didn't compile correctly.



ID# 780 (18/20)
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The red and blue lines weren't present in the PPM output file.