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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main(){
  5.  
  6.     int rows;
  7.     cin >> rows;
  8.  
  9.     cout << "Butterfly Pattern of rows "<<rows<< endl;
  10.  
  11.     // Main logic to print the Butterfly pattern.
  12.     // Printing upper part.
  13.     for( int i = 0; i <= rows; i++ ){
  14.         // Print left side stars.
  15.         for( int j = 0; j <= i; j++ ){
  16.             cout << "* ";
  17.         }
  18.  
  19.         // Print spaces.
  20.         int spaces = 2 * (rows - i);
  21.         for( int j = 0; j < spaces; j++){
  22.             cout << "  ";
  23.         }
  24.  
  25.         // Print right side stars.
  26.         for( int j = 0; j <= i; j++ ){
  27.             cout << "* ";
  28.         }
  29.  
  30.         cout << endl;
  31.     }
  32.  
  33.     // Printing bottom part.
  34.     for( int i = rows - 1; i >= 0; i-- ){
  35.  
  36.         // Print left side spaces.
  37.         for( int j = 0; j <= i; j++ ){
  38.             cout << "* ";
  39.         }
  40.  
  41.         // Print spaces.
  42.         int spaces = 2 * (rows - i);
  43.         for( int j = 0; j < spaces; j++){
  44.             cout << "  ";
  45.         }
  46.  
  47.         // Print right side stars.
  48.         for( int j = 0; j <= i; j++ ){
  49.             cout << "* ";
  50.         }
  51.  
  52.         cout << endl;
  53.     }
  54.  
  55.     return 0;
  56. }
  57.  
Success #stdin #stdout 0.01s 5276KB
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stdin
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6
stdout
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Butterfly Pattern of rows 6
*                         * 
* *                     * * 
* * *                 * * * 
* * * *             * * * * 
* * * * *         * * * * * 
* * * * * *     * * * * * * 
* * * * * * * * * * * * * * 
* * * * * *     * * * * * * 
* * * * *         * * * * * 
* * * *             * * * * 
* * *                 * * * 
* *                     * * 
*                         *
https://ideone.com/btwsiY
Butterfly pattern
language:
C++14 (gcc 8.3)
created:
12 days ago
visibility:
public

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