Python Programming: An Introduction to Computer Science
Python Programming: An Introduction to Computer Science
3rd Edition
ISBN: 9781590282779
Author: John Zelle
Publisher: Franklin Beedle & Associates
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Chapter 7, Problem 17PE
Program Plan Intro

Program to displays a circle bouncing around the window

Program plan:

  • Import the required packages
  • In the “main()” function,
    • Create the object of “GraphWin()”.
    • Set the coordinates by calling the function “setCoords()”
    • Create an object named “shape” and store the points
    • The outline of the circle is set to “red” color.
    • The circle is filled with “red” color.
    • Draw the circle with the use of function “draw()”.
    • Declare the required variables.
    • Initialize a for loop to get the value of the points.
      • Store the center of the circle in “c”.
      • If the x-value is greater than 80 then
        • Assign the value of “dx” as “-1”.
      • If the x-value is less than -80
        • Assign the value of “dx” as “1”.
      • If the y-value is greater than 80 then
        • Assign the value of “dy” as “-1”.
      • If the y-value is less than -80
        • Assign the value of “dy” as “1”.
      • Use the function “sleep()” to slow the program.
      • Move the circle to the resulting point.
  • Call the function named “main()”

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