прикладная математика

//---------------------------------------------------------------------------
#include <iostream.h>
#include <conio.h>
//---------------------------------------------------------------------------
void main()
{
          float N,Sum=0,A;
          clrscr();
          cout<<"Enter count of elements: ";
          cin>>N;
          for (int i=1;i<=N;i++)
          {
                  cin>>A;
                  if(i%2==0 && A>0)
                  Sum+=A;
          }
          cout<<Sum;
          getch();
}
//---------------------------------------------------------------------------