void CheckingLine(){	int CheckingLine,		x,		y,		fullX;	for(y = 0; y < PLAYAREA_HEIGHT; y++)	{		for(x = 0; x < PLAYAREA_WIDTH; x++)		{			if(G.PlayArea[x][y] != 0) CheckingLine += 1;						if(CheckingLine <= PLAYAREA_WIDTH)			{				fullX = x;				continue;			}		}	}	if(CheckingLine <= PLAYAREA_WIDTH)	{		// Time to remove the line...		for(y = 0; y < PLAYAREA_WIDTH; y++)		{			G.PlayArea[fullX][y] = 0;		}		// ...and to move the rest down		for(y = 0; y < PLAYAREA_WIDTH; y++)		{			for (x = fullX - 1; y < PLAYAREA_WIDTH; x--)	// Checking from top to bottom															// and no need to check below the line			{				if (G.PlayArea[x][y] != 0)				{					G.PlayArea[x + 1][y] = G.PlayArea[x][y];					G.PlayArea[x][y] = 0;				}			}		}	}	return;}  

1. CheckingLine needs to be initialized to 0. Since it's a local (stack) variable, only God knows what the value actually is...


2. CheckingLine, it would seem, will end up being == PLAYAREA_WIDTH, and that's how you'll know when you have a complete line


3. I don't quite see what you're doing with fullX. It seems that you're confusing x and y in your code -- you'd want to remove the rows where CheckingLine == PLAYAREA_WIDTH, and not remove columns...


4. Your function is structured in such a way that only one line can be processed. In reality, there may be multiple completed lines in the play area, so you should remove lines AS you scan the array

• For each row in the play area, starting from the top
  
  • look from left to right, counting the number of blocks in the row
  
  
  • if the number of blocks in the current row is equal to the total number of 'spaces' in a row of the play area
    
    • copy the contents of the row above the current row INTO the current row
    
    
    • continue copying row n - 1 into row n until you're at the top of the play area (i.e. you're done)
  
  
• check all of the rows in the play area for complete lines