#include <stdio.h>

const int UP = 0;
const int RIGHT = 1;
const int DOWN = 2;
const int LEFT = 3;

int main()
{
  int dir; //direction
  int x,y; //posiotion
  int u,r,d,l; //limits: up, right, down, left
  int count; //just counts the cells that printed

  char arr[4][3]=
    { {'1','2','3'} , {'4','5','6'} , {'7','8','9'} , {'a','b','c'}};

  //at first, direction set to be right
  dir=RIGHT;

  //we start at this corner
  x=0;
  y=0;

  //at first, limits are edges of array
  u=1;
  r=3-1;
  d=4-1;
  l=0;

  for(count=0;count<3*4;count++)///   כמו arr[x][y]??זו מטריצה
  {
    printf("%c ", arr[x][y]);
    if(dir == UP)///איך הפונקציה יכולה לזהות התקדמות למעלה?
    {
      //move to direction
      x--;
      //if we are on the limit: move limit one step to center & change direction
      if(x==u)
      {
        u++;
        dir=(dir+1)%4;
      }
    }
    else if (dir == RIGHT)
    {
      //move to direction
      y++;
      //if we are on the limit: move limit one step to center & change direction
      if(y==r)
      {
        r--;
        dir=(dir+1)%4;
      }
    }
    else if(dir == DOWN)
    {
      //move to direction
      x++;
      //if we are on the limit: move limit one step to center & change direction
      if(x==d)
      {
        d--;
        dir=(dir+1)%4;
      }
    }
    else if(dir == LEFT)
    {
      //move to direction
      y--;
      //if we are on the limit: move limit one step to center & change direction
      if(y==l)
      {
        l++;
        dir=(dir+1)%4;
      }
    }
  }
  return 0;
}