i know how to draw a square hollow or filled
but i need to draw an alternating pattern
ex
iPatternHeight = 1
X
iPatternHeight = 3
OOO
OXO
OOO
iPatternHeight = 5
XXXXX
XOOOX
XOXOX
XOOOX
XXXXX
iPatternHeight = 7
OOOOOOO
OXXXXXO
OXOOOXO
OXOXOXO
OXOOOXO
OXXXXXO
OOOOOOO
anybody can help?
I would say quit focusing exactly on the squareness of the shape. I will use the size 7 square, since I think it will clearly illustrate my thinking -- but it applies equally to the size 5 and size 3 ones. The 1 input is a special case, regardless.
OOOOOOO
OXXXXXO
OXOOOXO
OXOXOXO
What do you notice about these lines? For each line, there is a specific number of X's and O's to draw. First it was all O's. Notice that as the X's are filled in, the line composed of the same characters on the inside is getting shorter by two. So one way to program it is to keep track of what row you are on, alternate characters to the start of the inner line, and then fill the inner line, and then alternate characters until you are done with the whole row. When you get down to the inner line length of 1, you know to alternate like OXOXOXO.
The pattern below is the same as that pattern, done in reverse.
OXOOOXO
OXXXXXO
OOOOOOO
Once you can do it for this length, extend the concept for longer lines.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
