晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 sh-3ll

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// © 2017 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
 *******************************************************************************
 * Copyright (C) 2009-2017, International Business Machines Corporation,       *
 * Google, and others. All Rights Reserved.                                    *
 *******************************************************************************
 */

#ifndef __NOUNIT_H__
#define __NOUNIT_H__

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#if !UCONFIG_NO_FORMATTING

#include "unicode/measunit.h"

#ifndef U_HIDE_DRAFT_API

/**
 * \file
 * \brief C++ API: units for percent and permille
 */

U_NAMESPACE_BEGIN

/**
 * Dimensionless unit for percent and permille.
 * @see NumberFormatter
 * @draft ICU 60
 */
class U_I18N_API NoUnit: public MeasureUnit {
public:
    /**
     * Returns an instance for the base unit (dimensionless and no scaling).
     *
     * @return               a NoUnit instance
     * @draft ICU 60
     */
    static NoUnit U_EXPORT2 base();

    /**
     * Returns an instance for percent, or 1/100 of a base unit.
     *
     * @return               a NoUnit instance
     * @draft ICU 60
     */
    static NoUnit U_EXPORT2 percent();

    /**
     * Returns an instance for permille, or 1/1000 of a base unit.
     *
     * @return               a NoUnit instance
     * @draft ICU 60
     */
    static NoUnit U_EXPORT2 permille();

    /**
     * Copy operator.
     * @draft ICU 60
     */
    NoUnit(const NoUnit& other);

    /**
     * Destructor.
     * @draft ICU 60
     */
    virtual ~NoUnit();

    /**
     * Return a polymorphic clone of this object.  The result will
     * have the same class as returned by getDynamicClassID().
     * @draft ICU 60
     */
    virtual NoUnit* clone() const;

    /**
     * Returns a unique class ID for this object POLYMORPHICALLY.
     * This method implements a simple form of RTTI used by ICU.
     * @return The class ID for this object. All objects of a given
     * class have the same class ID.  Objects of other classes have
     * different class IDs.
     * @draft ICU 60
     */
    virtual UClassID getDynamicClassID() const;

    /**
     * Returns the class ID for this class. This is used to compare to
     * the return value of getDynamicClassID().
     * @return The class ID for all objects of this class.
     * @draft ICU 60
     */
    static UClassID U_EXPORT2 getStaticClassID();

private:
    /**
     * Constructor
     * @internal (private)
     */
    NoUnit(const char* subtype);

};

U_NAMESPACE_END

#endif  /* U_HIDE_DRAFT_API */
#endif /* #if !UCONFIG_NO_FORMATTING */

#endif /* U_SHOW_CPLUSPLUS_API */

#endif // __NOUNIT_H__
//eof
//