exercise_02

Exercise 02 - Ho ho ho! 🎄⛄️

Watch this video first! <- Click here or on the thumbnail below!

🎄⛄️ Ho ho ho! Merry Christmas!

Today's exercise is very simple but fun.

All you have to do is to print a Christmas tree to the console.

...with a star on top!

...and a trunk!

But there is a catch... hehehe.

// Example with height of 6

    *
    #
   ###
  #####
 #######
    |

The rules

The rules are simple:

• The tree should be printed in 3 parts: star, tree, trunk.
• The height should be dynamic. At least 4!
• The star should be printed in the middle of the first line.
• The tree layers should be centered/odd numbers of # characters.
• The trunk should be printed in the middle of the last line.
• The last layer of the tree should have a margin of 1 space on each side.

The height should be given as an argument to the print_christmas_tree() function.

Min value: 4

Only even numbers are allowed, e.g.: 4, 6, 8, 10, 12, etc.

// Example with height of 8

      *
      #
     ###
    #####
   #######
  #########
 ###########
      |

Difficulty levels

You can complete the task in 3 different difficulty levels:

Easy

Just call the print_christmas_tree() function with a fixed height as an argument.

e.g.:

print_christmas_tree(6);

You can also use the #define directive to define a constant.

Then, you may use a combination of for-loops and printf() to print the tree.

Medium

Call the print_christmas_tree() function with a dynamic height as an argument from the Command Line.

e.g.:

# UNIX
./main 6

# Windows
main.exe 6

You can use the atoi() function to convert the string to an integer or go beyond and use the strtol() function to convert the string to a long integer and do some error checking.

strtol: https://devdocs.io/c/string/byte/strtol

Hard

Everything from the Medium level, but also:

void print_star(size_t height)

and

void print_trunk(size_t height)

may NOT use a for-loop!

You are only allowed to use 2 for-loops in total!

Hint: You can use the printf() function to print multiple characters at once.

printf(): https://devdocs.io/c/io/fprintf

Check out this if you have no idea how to do it:

https://stackoverflow.com/... <- solution here!!!

The task

Watch the video first where I explain the task in detail.

Happy coding!

And remember: Don't Panic!

Where is the code?

The template code

Click on the src folder above. Then, click on the main.c file. This will open the template code in your browser. You can then copy/paste the code into your IDE or download the file.

./src/main.c

The solution code

The solution code is in the solution folder.

./solution/main.c

Intro video

Watch the video on YouTube <- Click here or on the thumbnail below!

Solution video

Coming soon!

Watch the video on YouTube <- Click here or on the thumbnail below!