C / C++ / MFC

#include <iostream>
using namespace std;
 
void main()
{
    const char *p[] = {"1", "2 2", "3 3 3", "4 4 4 4",
                       "5 5 5 5 5", "4 4 4 4", "3 3 3",
                       "2 2", "1"};
 
    for (int i=0; i<sizeof(p)/sizeof(*p); ++i)
    {
        cout << p[i] << endl;
    }
}

Rozis wrote:

Can you see any pattern in it?

#include <iostream>
using namespace std;
 
void main(){
  const static int threshold(5);
  for(int i(1), d(+1); i; i += d, d = (i == threshold)? -1 : d){
    for(int j(0), end(i); j != end; ++j) {
      cout << i << " ";
    }
    cout << endl;
  }
}