fork(12) download
copy 
  1. #include<stdio.h>
  2.  
  3. int main(){
  4.     int i,j,leaves=1,day,rest,branches,max_leaves;
  5.     scanf("%d",&day);
  6.  
  7.     //Check for exceptions
  8.     if(day<=1){
  9.         printf("You cannot generate christmas tree");
  10.         return 0;
  11.     }
  12.     else if(day>20){
  13.         printf("Tree is no more");
  14.         return 0;
  15.     }
  16.  
  17.     // printf("Heres Your Christmas Tree:\n\n");
  18.  
  19.     // For first part
  20.     branches=day+1;
  21.     max_leaves = 1+(branches-1)*2; // Arithmetic Progression
  22.     for(i=1;i<=branches;i++){
  23.         for(j=i;j<=max_leaves/2;j++){
  24.             printf(" ");
  25.         }
  26.         for(j=1;j<=leaves;j++){
  27.             printf("*");
  28.         }
  29.         printf("\n");
  30.         leaves=leaves+2;
  31.     }
  32.  
  33.     // For remaining parts
  34.     branches=branches-2;
  35.     for(rest=1;rest<=day-2;rest++){
  36.         leaves=3;
  37.         for(i=2;i<=branches+1;i++){
  38.             for(j=i;j<=max_leaves/2;j++){
  39.                 printf(" ");
  40.             }
  41.             for(j=1;j<=leaves;j++){
  42.                 printf("*");
  43.             }
  44.             printf("\n");
  45.             leaves=leaves+2;
  46.         }
  47.         branches--;
  48.     }
  49.  
  50.     // For stand
  51.     for(i=1;i<=2;i++){
  52.         for(j=1;j<=max_leaves/2;j++){
  53.             printf(" ");
  54.         }
  55.         printf("*\n");
  56.     }
  57.  
  58.     return 0;
  59. }
Success #stdin #stdout 0s 4520KB
comments (?)
stdin
copy 
5
stdout
copy 
     *
    ***
   *****
  *******
 *********
***********
    ***
   *****
  *******
 *********
    ***
   *****
  *******
    ***
   *****
     *
     *
https://ideone.com/8W1jDF
language:
C (gcc 8.3)
created:
5 years ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!