Method solve

C++/Sudoku-Solver.cpp:69–89

    
    
    bool solve(vector<vector<char>>& board)
    {
        int row,col;
        if(!findUnassignedLocation(board, row, col))
                return true;
        
            for(char i = '1' ; i<='9';i++)
            {
                if(isSafe(board,row,col,i))
                {
                    board[row][col] = i;
                    
                    if(solve(board))
                        return true;
                    
                    board[row][col] = '.';
                }
            }
        
        return false;
    }
    
	/* A utility function to print grid */
	void printGrid(vector<vector<char>>& board)