christmas_tree.c

/*******************************************************************************
*
* Program: Christmas Tree Printer
* 
* Description: Example of printing out a Christmas tree in C.
*
* YouTube Lesson: https://www.youtube.com/watch?v=0niA5Wzhwpg 
*
* Author: Kevin Browne @ https://portfoliocourses.com
*
*******************************************************************************/
#include <stdio.h>

int main(void)
{
  int height = 0;
  
  // ask the user for the height of the tree, store it into height
  printf("Enter height: ");
  scanf("%d", &height);
  printf("\n");
  
  // we'll print out a decreasing number of spaces and an increasing number 
  // of stars on each line from the top of the tree to the bottom of the tree
  for (int i = 1; i <= height; i++)
  {
    // star count will go from 1 up until 2x height - 1
    int starCount = (i * 2) - 1;

    // space count starts off at the center of the tree to print the top star, 
    // and from their decreases as i increases in order as we have more stars 
    // to print per line
    int spaceCount = height - i + 1;
    
    // print out the spaces
    for (int j = 0; j < spaceCount; j++)
      printf(" ");
    
    // print out the stars
    for (int j = 0; j < starCount; j++)
      printf("*");
    
    // print out a new line so the next line of stars starts on a new line
    printf("\n");
  }
  
  // creates a 3 star "trunk" for the tree, at the center of the tree
  for (int i = 0; i < 3; i++)
  {
    // print out enough spaces to reach the center of the tree
    for (int j = 0; j < height; j++)
      printf(" ");
    
    // print out a star, followed by a newline so the next part of the trunk
    // stars on a another line
    printf("*\n");
  }
  
  return 0;
}

// The above code can be used to generate trees like the below. Merry Christmas!
//
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