Mario

Implement a program that prints out a half-pyramid of a specified height, per the below.

$ python mario.py
Height: 4
   #
  ##
 ###
####

Getting Started

Log into code.cs50.io, click on your terminal window, and execute cd by itself. You should find that your terminal window’s prompt resembles the below:

$

Next execute

wget https://cdn.cs50.net/2022/fall/psets/6/sentimental-mario-less.zip

in order to download a ZIP called sentimental-mario-less.zip into your codespace.

Then execute

unzip sentimental-mario-less.zip

to create a folder called sentimental-mario-less. You no longer need the ZIP file, so you can execute

rm sentimental-mario-less.zip

and respond with “y” followed by Enter at the prompt to remove the ZIP file you downloaded.

Now type

cd sentimental-mario-less

followed by Enter to move yourself into (i.e., open) that directory. Your prompt should now resemble the below.

sentimental-mario-less/ $

Execute ls by itself, and you should see a mario.py. If you run into any trouble, follow these same steps again and see if you can determine where you went wrong!

If you’d like to open this problem in CS50 Lab, you can right-click or control-click on the sentimental-mario-less folder and choose “Open in CS50 Lab”. You should see the specification for this problem on the left-hand side and its distribution code on the right-hand side.

Specification

• Write, in a file called mario.py, a program that recreates the half-pyramid using hashes (#) for blocks, exactly as you did in Problem Set 1, except that your program this time should be written in Python.
• To make things more interesting, first prompt the user with get_int for the half-pyramid’s height, a positive integer between 1 and 8, inclusive.
• If the user fails to provide a positive integer no greater than 8, you should re-prompt for the same again.
• Then, generate (with the help of print and one or more loops) the desired half-pyramid.
• Take care to align the bottom-left corner of your half-pyramid with the left-hand edge of your terminal window.

Usage

Your program should behave per the example below.

$ python mario.py
Height: 4
   #
  ##
 ###
####

Testing

While check50 is available for this problem, you’re encouraged to first test your code on your own for each of the following.

• Run your program as python mario.py and wait for a prompt for input. Type in -1 and press enter. Your program should reject this input as invalid, as by re-prompting the user to type in another number.
• Run your program as python mario.py and wait for a prompt for input. Type in 0 and press enter. Your program should reject this input as invalid, as by re-prompting the user to type in another number.
• Run your program as python mario.py and wait for a prompt for input. Type in 1 and press enter. Your program should generate the below output. Be sure that the pyramid is aligned to the bottom-left corner of your terminal, and that there are no extra spaces at the end of each line.

#

• Run your program as python mario.py and wait for a prompt for input. Type in 2 and press enter. Your program should generate the below output. Be sure that the pyramid is aligned to the bottom-left corner of your terminal, and that there are no extra spaces at the end of each line.

 #
##

• Run your program as python mario.py and wait for a prompt for input. Type in 8 and press enter. Your program should generate the below output. Be sure that the pyramid is aligned to the bottom-left corner of your terminal, and that there are no extra spaces at the end of each line.

       #
      ##
     ###
    ####
   #####
  ######
 #######
########

• Run your program as python mario.py and wait for a prompt for input. Type in 9 and press enter. Your program should reject this input as invalid, as by re-prompting the user to type in another number. Then, type in 2 and press enter. Your program should generate the below output. Be sure that the pyramid is aligned to the bottom-left corner of your terminal, and that there are no extra spaces at the end of each line.

 #
##

• Run your program as python mario.py and wait for a prompt for input. Type in foo and press enter. Your program should reject this input as invalid, as by re-prompting the user to type in another number.
• Run your program as python mario.py and wait for a prompt for input. Do not type anything, and press enter. Your program should reject this input as invalid, as by re-prompting the user to type in another number.

Execute the below to evaluate the correctness of your code using check50. But be sure to compile and test it yourself as well!

check50 cs50/problems/2022/fall/sentimental/mario/less

Execute the below to evaluate the style of your code using style50.

style50 mario.py

How to Submit

1. Download your mario.py file by control-clicking or right-clicking on the file in your codespace’s file browser and choosing Download.
2. Go to CS50’s Gradescope page.
3. Click “Problem Set 6: Sentimental (Mario Less)”.
4. Drag and drop your mario.py file to the area that says “Drag & Drop”. Be sure it has that exact filename! If you upload a file with a different name, the autograder likely will fail when trying to run it, and ensuring you have uploaded files with the correct filename is your responsibility!
5. Click “Upload”.

You should see a message that says “Problem Set 6: Sentimental (Mario Less) submitted successfully!” You may not see a score just yet, but if you see the message then we’ve received your submission!