character graphics program

[slimshadyy]

What is it you are trying to achieve?
I am trying to write a program for a character graphics program.

Make an asterisk move down to the right at an angle (row and column must change at the same time). When you reach the last row, make it "bounce" off at the corresponding angle.


What is the problem you are having?
I don't know how to write this program.


Describe what you have tried to solve this problem
Nothing really. Don't know where to begin.


Post any relevant code (You may choose to attach the file instead of posting the code if it is too long)

Turing:

<Add your code here>

Please specify what version of Turing you are using
<Answer Here>

[Tony]

Well, what is the closest thing that you can refer to? Have you wrote _any_ program? How did you start those?

[slimshadyy]

well this is what i have so far

for i : 20..40
locate (i, i)
put " * " . .
end for

i dont know if thats right. and im not sure what to do next.

[Tony]

Not a bad start!

You can check if that's right by running the code, and seeing what it does. If something is off, describe what is wrong in detail. That should give you information about what to do next.

[slimshadyy]

i ran the program and added a delay. but i did 'for i : 1..40' instead and the asterisks moved down diagonally to the right from the top left, but how do i make it go to the top right from that spot? so it looks like it's "bouncing" off the edge.

ohh and whenever i run the program is says at the bottom, "Row of 26 is greater than maxrow (25)"
does that mean i'm doing it wrong?

[Tony]

One step at a time.

The window is sized at 25 rows (max row), so drawing something on row 26 is not well defined. The program chooses to end with a helpful error. You can figure out just how big the window is using the maxrow value instead of guessing at the number yourself.

Going up is similar. You can make a second loop and try to figure out how to make those numbers flow in a different direction.

Edit: you can using color to change the color of asterisks for the second loop, just in case the output from the two loops overlaps.