IB Computer Science 1
From WLCS
Contents
Friday (11/19/10)
Warmup:
- Take out scratch paper and work out the Fibonacci sequence
- Assign variables to the first two numbers
- ...how do you calculate the third number?
- What should happen next?
Agenda:
- Looping Exercises
- Looping with GASP Exercises
- GASP w/ loops
- Use the following template in a file named loopGasp.py:
from gasp import *
begin_graphics()
int x = 0
while x < 1000:
print x
Circle ( (0, 0), x)
x = x + 10
update_when('key_pressed')
end_graphics()
- What do you see when you run the code above?
- Let's try to create some other graphics with GASP and loops
- Draw a bunch of Circles across the bottom of the screen
- Draw Circles along all the sides of the screen (left, bottom, right, top)
- Draw a diagonal of Circles from the bottom-left to the upper-right
- Draw 100 Circles of random sizes and random locations throughout the screen (HINT: random.randint())
- Draw 10 random Circles, but each time you draw a Circle, connect a Line from it to the previous Circle
Wednesday (11/17/10)
Warmup:
- Assume you have the following code:
1 i = 0
2 while i < 10:
3 print "All work and no play makes Jack a dull boy."
4 i = i + 1
- What is the counter variable?
- What is the condition of the loop? (i.e. when does it end?)
Agenda:
Monday (11/15/10)
Warmup:
- Assume you have the following code:
1 a = 0
2 b = 1
3 c = 0
4 a = a + 1
5 c = c + 1
6 b = a * c
7 c = c + 1
- What are the final values of a, b, and c?
Agenda:
- Introduction to Iteration (looping)
- while loops
- counter variables
- Looping practice
- Print out all the numbers from 0-50
- Print out all the numbers from 75 down to 25
- Write a loop that prints out the first 100 even numbers
- Prompt the user for a number and store it in a variable n, then print out the first n odd numbers (starting at 1) using a loop
- Print out all the numbers that are divisible by 6 from 0 through 100
- Guessing Game Assignment
Wednesday (11/10/10)
Warmup:
- Complete the HTTLACS: Ch 5 exercises and demo to Mr. Bui
Agenda:
- Introduction to GASP
- Creating useful functions
Monday (11/8/10)
Warmup:
- Prompt the user to enter a decimal (float) number and store in variable x
- print int(x)
- print round(x)
- Test out your program using several numbers (e.g. 3.2, 4.5, 5.9)
- What do you think the int() and round() functions do?
Agenda:
- Review return
- Review doctests
- Complete the exercises at the end of HTTLACS: Ch 5 (w/ doctests)
Thursday (11/4/10)
Warmup:
- Define a function named slope(x1, y1, x2, y2) that takes the four listed parameters
- Calculate the slope and store it in a variable m
- print m
Agenda:
- Return and go over 1st Quarter Exam
- Re-introduction to Functions
- return keyword
- doctests
- HTTLACS: Ch 5
- Complete the exercises at the end of Chapter 5 (w/ doctests)
Monday (11/1/10)
Warmup:
- Prompt the user to enter his/her grade (0-100)
- Using if statements, do the following:
- if the grade is greater than or equal to 90, then print "You have an A"
- if the grade is less than 90 and the grade is greater than or equal to 80, then print "You have a B"
- if the grade is less than 80 and the grade is greater than or equal to 70, then print "You have a C"
- if the grade is less than 70 and the grade is greater than or equal to 60, then print "You have a D"
- if the grade is less than 60, then print "You have an E"
Agenda:
- Demo Geek Flow Chart Assignment today
- Go to HTTLACS: Ch 4 and read section 4.11: GASP
- Try out the GASP code to see if it works
- Try to draw a stick figure