235B
David COSC A. Sykes
Quiz 6
April 18, 2008
1. Show the output of the program on the second sheet given the following user inputs [bold]:
Welcome to the frog simulation. Enter the depth of the well: 10 Enter the height of the frog above the bottom: 5 Enter the distance the frog hops up during a day: 3 Enter the distance the frog slides down during a night: 1
Day 1: 8 , night: 7 Day 2: 10 Escape requires 2 days.
2. Draw a structure chart for the program.
depth position hopUp slideDown
main
days depth position hopUp slideDown
getSimParameters
prompt lo hi value
sim
getValue
3. Describe what a unit test is. A unit test is a program that checks to see if a function does what it is supposed tothat is, it behaves according to its specification.
4. Write an expression that produces a random number in the range 1..6, inclusive. random.randrange(1,7)
Key Name: _____________________________
Pledged: _____________________________
COSC 235B
David A. Sykes
def sim(depth, h, up, down): pos = h day = 0 while pos < depth: day += 1 # Climb up during the day pos += up print "Day %d: %3d" (day, % pos), # Slide down during the night, unless already out if pos < depth: # Still in the well pos = max(pos-down, 0) print ", night: %3d" % (pos), print return day def getValue(prompt, lo, hi): "Issue a prompt and accept input in the range lo..hi" value = input(prompt) while value < lo or value > hi: value = input(" Enter a value in the range %s..%s: " % (lo, hi)) return value def getSimParameters(): print "Welcome to the frog simulation." depth = getValue("Enter the depth of the position = getValue("Enter the height of 0, depth) hopUp = getValue("Enter the distance the 0, 10000) slide...