fifteen.c - shared from CS50 IDE

fifteen.c

 void init(void)
   {
    // TODO
    int k=(d*d)-1;
    for(int i=0;i<d;i++)
    {
    for(int j=0;j<d;j++)  
    {
      board[i][j]=k--;  
    }
    }
    if(k%2==0)
    {
      if(board[d-1][d-3]==2 && board[d-1][d-2]==1)  
      me_swap(&board[d-1][d-3], &board[d-1][d-2]);
    }
   }
   
 /**
 * Prints the board in its current state.
 */
void draw(void)
{
    // TODO
    
    for(int i=0;i<d;i++)
    {
    for(int j=0;j<d;j++)  
    {
      
    if(board[i][j]==0)
    {
        
     printf("_  \t");       
    }
    else
    {
      printf("%2d \t ",board[i][j]);  
    }
    }
    printf("\n");
    }
}
  
/**
 * If tile borders empty space, moves tile and returns true, else
 * returns false. 
 */
bool move(int tile)
{
    // TODO
    int blank_space=0;
    for(int i=0;i<d;i++)
    {
    for(int j=0;j<d;j++)  
    {
      if(tile==board[i][j] && tile<(d*d-1) && tile>0)
        {
           if(board[i-1][j]==blank_space)
            {
               me_swap(&board[i][j],&board[i-1][j]);
               return true;
            }
            if( board[i][j-1]==blank_space)
            {
              me_swap(&board[i][j-1],&board[i][j]);
              return true;
            }
            if(board[i+1][j]==blank_space )
            {
                me_swap(&board[i][j],&board[i+1][j]);
                return true;
            }
            if(board[i][j+1]==blank_space)
            
            {
              me_swap(&board[i][j],&board[i][j+1]);
             return true;
            }
        
            
           
        }
      
    }
    
    }
    
return false;
}

/**
 * Returns true if game is won (i.e., board is in winning configuration), 
 * else false.
 */
bool won(void)
{
    // TODO
    int a=0;
    int won_board[d][d];
    for(int i=0;i<d;i++)
    {
    for(int j=0;j<d;j++)  
    {
        
        won_board[i][j]= a++;
    
    }
    }
    for(int i=0;i<d;i++)
    {
    for(int j=0;j<d;j++)    
    {
    if(board[i][j]==won_board[i][j])
     {
         return true;
     }
    }
    }
 return false;
}

//call swap when in need to
 void me_swap (int *a, int *b)
{
 int temp=*a;
 *a=*b;
 *b=temp;
}