Printing Interesting Patterns in C++

This article prints an interesting pattern using C++ programming. Here is the algorithm as following

Algorithm

Step-1 Define the size which will be double automatically
Step-2 Print the upper section using a loop
Step-3 Print the lower section using a loop

Example

Based on the above algorithm, the following c++ code is carved out as;

 Live Demo

#include <iostream>
using namespace std;
int main(){
   int n=3;
   int i,j;
   // This is upper half of pattern
   for (i=1; i<=n; i++){
      for (j=1; j<=(2*n); j++){
         // Left part of pattern
         if (i<j)
            cout<<" ";
         else
            cout<<"*";
         // Right part of pattern
         if (i<=((2*n)-j))
            cout<<" ";
         else
            cout<<"*";
      }
      cout<<endl;
   }
   // This is lower half of pattern
   for (i=1; i<=n; i++){
      for (j=1;j<=(2*n);j++){
         // Left part of pattern
         if (i>(n-j+1))
            cout<<" ";
         else
            cout<<"*";
         // Right part of pattern
         if ((i+n)>j)
            cout<<" ";
         else
            cout<<"*";
      }
      cout<<endl;
   }
   return 0;
}

After compilation of the above code, the interesting pattern will be printed looks like as.

Output

*          *
* *      * *
* * * * * *
* * * * * *
* *      * *
*          *