Problem 1:

# Program: tip.py
# Author: Brenda Student
# Class: CSCI 110
# Date: 2/11/11
# Assignment: Lab3
# Purpose: Compute a 15% tip and print it out with formatting.

bill = input("Please enter the amount of the bill: ")
print
tip = bill* 0.15
print "A 15 percent tip would be $%6.2f, which is a lot."%tip

Problem 2:

# Program: flower.py
# Author: Brenda Student
# Class: CSCI 110
# Date: 2/11/11
# Assignment: Lab3
# Purpose: Use a turtle to draw a flower

from turtle import Pen as Turtle

petals = input("How many petals would you like? ")

yertle = Turtle( )

turn = 360/petals
count = 0

while count < petals:
    yertle.forward(50)
    yertle.left(20)
    yertle.forward(50)
    yertle.left(160)
    yertle.forward(50)
    yertle.left(20)
    yertle.forward(50)
    yertle.left(160)
    yertle.left(turn)
    count = count + 1

Problem 3:

# Program: guess.py
# Author: Brenda Student
# Class: CSCI 110
# Date: 2/11/11
# Assignment: Lab3
# Purpose: To play the "Guess My Number" game.

import random

myNumber = random.randrange(10) + 1

guess = input("Guess a number between 1 and 10: ")
guessNumber = 1

while guess != myNumber and guessNumber < 4:
    if guess > myNumber:
        print "Too high.  Guess again!"
    else:
        print "Too low.  Guess again!"
    guess = input("Guess a number between 1 and 10: ")
    guessNumber = guessNumber + 1

if guess == myNumber:
    print "You guessed it!"
else:
    print "Sorry.  You failed to guess in 4 tries."