C++ program to print diamond star pattern

Example

Input :

Enter Input : 5

Output :

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

Required knowledge

Basic C++ programming, if-else, for loop, nested loop

Program to print diamond star pattern

/**
     C++ program to print diamond star pattern
*/

#include <iostream> 
using namespace std;
int main() 
{
     int i, j, rows;
     int stars, spaces;
     cout<<"Enter rows to print : ";
     cin>>rows;
     stars = 1;
     spaces = rows - 1;

     /* Iterate through rows */
     for(i=1; i<rows*2; i++)
     {
          /* Print spaces */
          for(j=1; j<=spaces; j++)
               cout<<" ";

          /* Print stars */
          for(j=1; j<stars*2; j++)
               cout<<"*";
   
          /* Move to next line */
          cout<<"\n";

          if(i<rows)
          {
               spaces--;
               stars++;
          }
          else
          {
               spaces++;
               stars--;
          }
     }
     return 0;
}