This lab assignment requires you to write three programs in python. First, run update21. This will create the cs21/labs/02 directory and copy over any starting-point files for your programs. Next, move into your cs21/labs/02 directory and begin working on the python programs for this lab. The pwd command helps you verify that you are in the correct sub-directory.
$ update21 $ cd cs21/labs/02 $ pwd /home/your_user_name/cs21/labs/02We will only grade files submitted by handin21 in this labs directory, so make sure your programs are in this directory!
Write a program called textfun.py that prompts the user to enter a phrase and then displays that phrase as a box in the terminal window.
Here are some sample runs of such a program:
$ python textfun.py Word or phrase: hello hello h h e e l l l l o o hello $ python textfun.py Word or phrase: SWARTHMORE SWARTHMORE S S W W A A R R T T H H M M O O R R E E SWARTHMORE
Note/Hint: since the above boxes are being output to a computer terminal, they
must be created one line at a time, from top to bottom. You can't print
out the left side of the box, then go back up and print out the right
side of the box.
Assuming the bank uses monthly compounding, you can calculate the interest earned in a month as follows:
interest = (current_balance*rate)/12
NOTE: if the rate entered is, say, 6%, in your program you would use 0.06 for the above calculation.
If you know how much interest is earned in a month, you can calculate the new monthly balance by adding the interest and the monthly deposit to the current balance.
Show the user how much interest they earn each month and their current balance each month for one full year. Here are some sample runs of such a program:
$ python savings.py Initial Deposit: 500 Monthly Deposit: 20 Rate of Return: 2 Month: 1 Balance: $520.83 (interest: $0.83) Month: 2 Balance: $541.70 (interest: $0.87) Month: 3 Balance: $562.60 (interest: $0.90) Month: 4 Balance: $583.54 (interest: $0.94) Month: 5 Balance: $604.51 (interest: $0.97) Month: 6 Balance: $625.52 (interest: $1.01) Month: 7 Balance: $646.56 (interest: $1.04) Month: 8 Balance: $667.64 (interest: $1.08) Month: 9 Balance: $688.75 (interest: $1.11) Month: 10 Balance: $709.90 (interest: $1.15) Month: 11 Balance: $731.09 (interest: $1.18) Month: 12 Balance: $752.30 (interest: $1.22)
$ python savings.py Initial Deposit: 10000 Monthly Deposit: 100 Rate of Return: 6.5 Month: 1 Balance: $10154.17 (interest: $54.17) Month: 2 Balance: $10309.17 (interest: $55.00) Month: 3 Balance: $10465.01 (interest: $55.84) Month: 4 Balance: $10621.70 (interest: $56.69) Month: 5 Balance: $10779.23 (interest: $57.53) Month: 6 Balance: $10937.62 (interest: $58.39) Month: 7 Balance: $11096.86 (interest: $59.25) Month: 8 Balance: $11256.97 (interest: $60.11) Month: 9 Balance: $11417.95 (interest: $60.98) Month: 10 Balance: $11579.79 (interest: $61.85) Month: 11 Balance: $11742.52 (interest: $62.72) Month: 12 Balance: $11906.12 (interest: $63.61)
NOTE: there are formulas to calculate future balances, but we want you to use an accumulator algorithm for this problem.
Here's an online calculator to test against: bankrate.com
puzzle = [9,0,7,5,6,0,0,4,3,0,1,4,0,8,0,0,6,...,8,5,0,0,3,9,6,0,4]
how would you access all numbers for a given row or column? (HINT: use slicing!)
For this problem, assume the puzzle is stored in the python list in row-major order ([all numbers for row 0, then all numbers for row 1, all numbers for row 2, and so on]), and we use 0's to represent empty boxes.
Write a program called sudoku.py that does the following, given the above puzzle as a python list:
$ python sudoku.py 0 1 2 3 4 5 6 7 8 0 [9, 0, 7, 5, 6, 0, 0, 4, 3] 1 [0, 1, 4, 0, 8, 0, 0, 6, 5] 2 [0, 0, 5, 0, 0, 0, 7, 2, 0] 3 [0, 0, 8, 0, 9, 0, 0, 0, 1] 4 [0, 0, 0, 0, 7, 0, 0, 0, 0] 5 [6, 0, 0, 0, 5, 0, 4, 0, 0] 6 [0, 3, 9, 0, 0, 0, 8, 0, 0] 7 [4, 7, 0, 0, 1, 0, 3, 9, 0] 8 [8, 5, 0, 0, 3, 9, 6, 0, 4] Row to print: 3 [0, 0, 8, 0, 9, 0, 0, 0, 1] Column to print: 7 [4, 6, 2, 0, 0, 0, 0, 9, 0] Number of empty spaces in this puzzle: 46
Once you are satisfied with your programs, hand them in by typing handin21 at the unix prompt.
You may run handin21 as many times as you like. We will grade the most recent submission submitted prior to the deadline
Remember: for this lab, programs must appear in your cs21/labs/02 directory. If you create your programs in a different directory, use the unix mv or cp commands to move or copy them into the cs21/labs/02 directory. For example:
cp myprog.py ~/cs21/labs/02/myprog.py