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()”