Lecture 7
3
Counting
•1,2,3,... (everyday,
mathematics)
•0,1,2,... (computer
science)
•Screen models (x,y)
coordinates
–y value increases as you read down
–(0,0) is upper left hand
corner
–Each location holds one pixel
– a character
–Frame of +’s is not part of Screen
•5 ´ 3 Screen with
G at
position (3,1), & at position (0,2)
0 1 2 3 4
+
+ + + + + +
0 + +
1 +
G +
2 + & +
+
+ + + + + +