c-labs/lab-3/lab_3_description.md

Lab 3 - Fancy shapes

In this lab we'll be focusing on the C programming aspect. This will cover for-loops and if-statements. To practice these we'll be drawing some shapes in the terminal!

The input will be one of the following numbers, passed through argv:

1. A square
2. A triangle
3. An inverted triangle (upside down)
4. A diamond

Your program will take in 2 arguments. The first is a number between 1 and 4, indicating which of the shapes listed above you'll be printing. The second argument is a number indicating the largest horizontal width of the shape. For example, for a triangle, this'll be the width of the base.

Your program will print the indicated shape at the indicated dimensions. Write your code in a main.c file, then run bash check.sh main.c to test your code.

Examples

Example 1

./a.out 1 4

Output:

$$$$
$$$$
$$$$
$$$$

Example 2

./a.out 1 10

Output:

$$$$$$$$$$
$$$$$$$$$$
$$$$$$$$$$
$$$$$$$$$$
$$$$$$$$$$
$$$$$$$$$$
$$$$$$$$$$
$$$$$$$$$$
$$$$$$$$$$
$$$$$$$$$$

Example 3

./a.out 2 6

Output:

  $$
 $$$$
$$$$$$

Notice how with an even number for the width, will result with 2 at the top, not one.

Example 4

./a.out 2 7

Output:

   $
  $$$
 $$$$$
$$$$$$$

Example 5

./a.out 3 14

Output:

$$$$$$$$$$$$$$
 $$$$$$$$$$$$
  $$$$$$$$$$
   $$$$$$$$
    $$$$$$
     $$$$
      $$

Example 6

./a.out 4 14

Output:

      $$
     $$$$
    $$$$$$
   $$$$$$$$
  $$$$$$$$$$
 $$$$$$$$$$$$
$$$$$$$$$$$$$$
 $$$$$$$$$$$$
  $$$$$$$$$$
   $$$$$$$$
    $$$$$$
     $$$$
      $$

Example 7

./a.out 4 15

Output:

       $
      $$$
     $$$$$
    $$$$$$$
   $$$$$$$$$
  $$$$$$$$$$$
 $$$$$$$$$$$$$
$$$$$$$$$$$$$$$
 $$$$$$$$$$$$$
  $$$$$$$$$$$
   $$$$$$$$$
    $$$$$$$
     $$$$$
      $$$
       $

Testing

Run the following command to test your work:

bash check.sh main.c

If the output doesn't say you passed, your program has a bug. Fix it and then try again.