Question

I saw this piece of C# code in one of the msdn articles:

using System; class Test
{
   public static unsafe void Main() 
   {
      int* fib = stackalloc int[100];
      int* p = fib;
      *p++ = *p++ = 1;
      for (int i=2; i<100; ++i, ++p)
         *p = p[-1] + p[-2];
      for (int i=0; i<10; ++i)
         Console.WriteLine (fib[i]);
   }
}

I am fairly new to pointers. I understand most of this code, but it would be great if someone can help me understand this line in the above code in more detail:

*p++ = *p++ = 1 

Answer 1

That’s just a lazy (others would say idiomatic) way to write

*p++ = 1;
*p++ = *p++;

or, perhaps better to understand:

*p=1;
p++;
*p=1;
p++;