//union row,col into one number
int VarUnion(int row, int col)
{
	return (row*10)+col;
}

//dissassembly the number into row and col
void DissAssembly(int *row, int *col, int var)
{
	*row = var/10;
	*col = var%10;
}

Check(int row, int col)
{
	int sRow = row, sCol = col, RetVal, bOk = 1;

	//up vertical
	while(sRow>=0)
	{
		if(sln[sRow][sCol]<0)
		{
			bOk = 0;
			break;
		}
		else sRow--;
	}

	if(bOk == 0)
		return 0;

	sRow = row;
	sCol = col;

	//down vertical
	while(sRow<=7)
	{
		if(sln[sRow][sCol]<0)
		{
			bOk = 0;
			break;
		}
		else sRow++;
	}

	if(bOk == 0)
		return 0;

	sRow = row;
	sCol = col;

	//right horizontal
	while(sCol<=7)
	{
		if(sln[sRow][sCol]<0)
		{
			bOk = 0;
			break;
		}
		else sCol++;
	}

	if(bOk == 0)
		return 0;

	sRow = row;
	sCol = col;

	//left horizontal
	while(sCol>=0)
	{
		if(sln[sRow][sCol]<0)
		{
			bOk = 0;
			break;
		}
		else sCol--;
	}

	if(bOk == 0)
		return 0;

	sRow = row;
	sCol = col;

	//up right diagonal
	while(sRow>=0 && sRow<=7 && sCol<=7)
	{
		if(sln[sRow][sCol]<0)
		{
			bOk = 0;
			break;
		}
		RetVal = VarUnion(sRow,sCol);
		RetVal -= 9;
		DissAssembly(&sRow,&sCol,RetVal);
	}

	if(bOk == 0)
		return 0;

	sRow = row;
	sCol = col;

	//up left diagonal
	while(sRow>=0 && sRow<=7 && sCol>=0 && sCol<=7)
	{
		if(sln[sRow][sCol]<0)
		{
			bOk = 0;
			break;
		}
		RetVal = VarUnion(sRow,sCol);
		RetVal -= 11;
		DissAssembly(&sRow,&sCol,RetVal);
	}

	if(bOk == 0)
		return 0;

	sRow = row;
	sCol = col;

	//down left diagonal
	while(sRow<=7 && sCol>=0 && sCol<=7)
	{
		if(sln[sRow][sCol]<0)
		{
			bOk = 0;
			break;
		}
		RetVal = VarUnion(sRow,sCol);
		RetVal += 9;
		DissAssembly(&sRow,&sCol,RetVal);
	}

	if(bOk == 0)
		return 0;

	sRow = row;
	sCol = col;

	//down right diagonal
	while(sRow<=7 && sCol<=7)
	{
		if(sln[sRow][sCol]<0)
		{
			bOk = 0;
			break;
		}
		RetVal = VarUnion(sRow,sCol);
		RetVal += 11;
		DissAssembly(&sRow,&sCol,RetVal);
	}

	if(bOk == 0)
		return 0;

	sln[row][col] = -1;

	return 1;
}