Question

I am having a brain shock right now so I wanted to ask very simple question.

Currenly, I am trying to print out starts like this

when input is 7 , the output is

* 
** 
* 
** 
* 
** 
*

and here my code is , it prints 14 times instead of 7 or when I put N/2 it doesnt print the odd number.

#include <iostream>
using namespace std;

int main () {


    int N;
    cout << " Please enter N " ;
    cin >> N;


    for (int i = 0; i < N ; i++) {

        cout << "*" << endl;

        for (int j = 0; j < 2; j++) {

            cout << "*" ;
        }
        cout << endl;
    }
}

Answer 1

For each N you are printing two lines, with single * and another with two *. Instead just print single line with either one or two star based on the line is odd or even.

#include <iostream>

int main ()
{
  unsigned int N;
  cout << " Please enter N " ;
  cin >> N;

  for(unsigned int i = 0; i < N; ++i)
  {
    if(i%2 == 0)
    {
      std::cout << "*" << std::endl;
    }
    else
    {
      std::cout << "**" << std::endl;
    }
  }
}

(Untested code)