Recursive functions in C and printf

Question

So, first of all I\'m a total beginner in C, we\'re studying it at University on the course \'Structured Programming\'.

Now, the last few lectures about \'Recursive func

Answer 1

The reversal is done using the call stack of the functions. By that I mean that the way the functions are called, this guarantess that the MSB will be printed first then the next one and so on.

void binary(int num)
{
    if (num == 0) return;

    binary(num / 2);  // Wait, I will print but you first print the MSB's.
    printf("%d", num % 2); // Now I print the last digit.
}

---

Downward motion moves the calls.

{binary(12)                     
   {binary(6)                 
      {binary(3)        
        {binary(1)  
             binary(0) -- returns
        Now we print 1
        }
      print 1
      }
   prints 0
   }
prints 0
}