Starting Out with Python (4th Edition)
4th Edition
ISBN: 9780134444321
Author: Tony Gaddis
Publisher: PEARSON
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Chapter 5, Problem 24PE
Program Plan Intro
Rectangular Pattern
Program plan:
- • Import turtle module
- • Declare constant variables “SPEED=0”, “X_VALUE=0”, and “Y_VALUE=0”.
- • Define function “rect_shape” by passing the variables “m”, “n”, “wid”, “high”, and “color”.
- ○ Set heading for the turtle.
- ○ Set the color for the rectangle using the function “fillcolor ()”.
- ○ Set the pen’s state “turtle.penup ()”.
- ○ Move the pen to the co-ordinates (m,n).
- ○ Set the pen’s state “turtle.pendown ()”.
- ○ Call “begin_fill ()” function (it should be called before drawing a shape).
- ○ Set pen to move forward “turtle.forward(wid)”.
- ○ Set pen to move left “turtle.left(90)”.
- ○ Set pen to move forward “turtle.forward(high)”.
- ○ Set pen to move left “turtle.left(90)”.
- ○ Set pen to move forward “turtle.forward(wid)”.
- ○ Set pen to move left “turtle.left(90)”.
- ○ Set pen to move forward “turtle.forward(high)”.
- ○ Call “end_fill ()” function.
- • Declare a function “drawPattern ()” by passing the parameters “rect_width” and “rect_height”.
- ○ Call the function “rect_shape” by passing the parameters “X_VALUE”, “Y_VALUE”, “rect_width”, “rect_height”, and “white”.
- ○ Calculate the “x_mid” value.
- ○ Calculate the “y_mid” value.
- ○ Calculate the “wid_mid” value.
- ○ Calculate the “high_mid” value.
- ○ Call the function “rect_shape” by passing the variables “x_mid”, “y_mid”, “wid_mid”, “high_mid”, and “white”.
- ○ Calculate the “x_in” value.
- ○ Calculate the “y_in” value.
- ○ Calculate the “wid_in” value.
- ○ Calculate the “high_in” value.
- ○ Call the function “rect_shape” by passing the variables “x_in”, “y_in”, “wid_in”, “high_in”, and “black”.
- ○ Set the pen’s state “turtle.penup ()”.
- ○ Move the pen to the co-ordinates (X_VALUE,Y_VALUE).
- ○ Set the pen’s state “turtle.pendown ()”.
- ○ Move the pen to the co-ordinates (x_in, y_in).
- ○ Set the pen’s state “turtle.penup ()”.
- ○ Move the pen to the co-ordinates (X_VALUE + rect_width, Y_VALUE + rect_height).
- ○ Set the pen’s state “turtle.pendown ()”.
- ○ Move the pen to the co-ordinates (x_in + wid_in, y_in + high_in).
- ○ Set the pen’s state “turtle.penup ()”.
- ○ Move the pen to the co-ordinates (X_VALUE + rect_width, Y_VALUE ).
- ○ Set the pen’s state “turtle.pendown ()”.
- ○ Move the pen to the co-ordinates (x_in + wid_in, y_in).
- ○ Set the pen’s state “turtle.penup ()”.
- ○ Move the pen to the co-ordinates (X_VALUE , Y_VALUE + rect_height).
- ○ Set the pen’s state “turtle.pendown ()”.
- ○ Move the pen to the co-ordinates (x_in , y_in + high_in).
- ○ Set the pen’s state “turtle.penup ()”.
- ○ Move the pen to the co-ordinates (X_VALUE , Y_VALUE + rect_height/2).
- ○ Set the pen’s state to down position.
- ○ Move the pen to the specified co-ordinates.
- ○ Set the pen’s state to up position.
- ○ Move the pen to the specified co-ordinates (X_VALUE + rect_width, Y_VALUE + rect_height/2).
- ○ Set the pen’s state to down position.
- ○ Move the pen to the co-ordinates (x_in + wid_in, Y_VALUE + rect_height/2).
- ○ Set the pen’s state to up position.
- ○ Move the pen to the co-ordinates (X_VALUE + rect_width/2 , Y_VALUE).
- ○ Set the pen’s state to down position.
- ○ Move the pen to the co-ordinates (X_VALUE + rect_width/2 , y_in).
- ○ Set the pen’s state to up position.
- ○ Move the pen to the co-ordinates (X_VALUE + rect_width/2 , Y_VALUE + rect_height).
- ○ Set the pen’s state to down position.
- ○ Move the pen to the co-ordinates (X_VALUE + rect_width/2 , y_in + high_in).
- • Define a function “main()”.
- ○ Call the function “speed()”.
- ○ Call the function “hideturtle()”.
- ○ Prompt the user to enter the width.
- ○ Prompt the user to enter the height.
- ○ Call the function “drawPattern()” by passing the parameter.
- • Call the main() function.
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Chapter 5 Solutions
Starting Out with Python (4th Edition)
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