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  1. #include<bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main(){
  5.  
  6.     int rows;
  7.     // Getting the number of rows.
  8.     cout << "Enter the Number of rows - ";
  9.     cin >> rows;
  10.  
  11.     cout << "Butterfly Pattern of " << rows << " rows." << endl;
  12.  
  13.     // Main logic to print the Butterfly pattern.
  14.     // Printing upper part.
  15.     for( int i = 0; i <= rows; i++ ){
  16.         // Print left side stars.
  17.         for( int j = 0; j <= i; j++ ){
  18.             cout << "* ";
  19.         }
  20.  
  21.         // Print spaces.
  22.         int spaces = 2 * (rows - i);
  23.         for( int j = 0; j < spaces; j++){
  24.             cout << "  ";
  25.         }
  26.  
  27.         // Print right side stars.
  28.         for( int j = 0; j <= i; j++ ){
  29.             cout << "* ";
  30.         }
  31.  
  32.         cout << endl;
  33.     }
  34.  
  35.     // Printing bottom part.
  36.     for( int i = rows - 1; i >= 0; i-- ){
  37.  
  38.         // Print left side spaces.
  39.         for( int j = 0; j <= i; j++ ){
  40.             cout << "* ";
  41.         }
  42.  
  43.         // Print spaces.
  44.         int spaces = 2 * (rows - i);
  45.         for( int j = 0; j < spaces; j++){
  46.             cout << "  ";
  47.         }
  48.  
  49.         // Print right side stars.
  50.         for( int j = 0; j <= i; j++ ){
  51.             cout << "* ";
  52.         }
  53.  
  54.         cout << endl;
  55.     }
  56.  
  57.     return 0;
  58. }
  59.  
Success #stdin #stdout 0.01s 5316KB
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stdin
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6
stdout
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Enter the Number of rows - Butterfly Pattern of 6 rows.
*                         * 
* *                     * * 
* * *                 * * * 
* * * *             * * * * 
* * * * *         * * * * * 
* * * * * *     * * * * * * 
* * * * * * * * * * * * * * 
* * * * * *     * * * * * * 
* * * * *         * * * * * 
* * * *             * * * * 
* * *                 * * * 
* *                     * * 
*                         *
https://ideone.com/7iYlev
Butterfly Pattern
language:
C++ (gcc 8.3)
created:
16 days ago
visibility:
public

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