C++中的“对象”概念实质是什么呢？

勇敢的搬砖人 2010-01-26 07:21:01

C++中的“对象”概念实质是什么呢？

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icansaymyabc 2010-01-26

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“对象”可以理解为一个实体，而非纯概念性的东西。

febbird1984 2010-01-26

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就是某种数据类型的实例

int a=5;//a是一个对象,是int的一个实例

class A
{
char c;
} a;//a也是一个对象,是class A的一个实例

zzcmx2008 2010-01-26

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对象，就是现实社会的一种抽象，具体说是一件确切存在的事物的抽象出来的模型。

icerlion 2010-01-26

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建议看看相关书籍

rtygbwwwerr 2010-01-26

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类的实例就是对象。举个例子，有一种动物叫熊猫
对应的类定义：class CPanda{}；
北京动物园的熊猫胖胖即为熊猫类的一个实例对象：
对应的定义：CPanda BJPangPang;
BJPangPang就是一个对象

icerlion 2010-01-26

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扩展的struct

cismylife 2010-01-26

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有人这样说过

卡拉是条狗。
狗：一张嘴，两只眼睛，四条腿，。。。。会跑，回咬，回叫

public class dog{
String name;
int mouth=1;
int eyes=2;
....
dog(String dogname){
name=dogname;
};
public run(){};
...
}

...
dog kala=new dog("卡拉");

对象就是: 把卡拉和kala，在现实世界和计算机世界联系起来

crst_zh 2010-01-26

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对象---“具体的”一个“实例”

lovesi3344 2010-01-26

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对象

如果是类的对象
实质就是类这种类型的变量
又称“类的实例”

如果是广义的对象
实质就是一种“东西”

自由建客 2010-01-26

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数据结构对象

飞天御剑流 2010-01-26

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1.8 The C+ + object model [intro.object]

1 The constructs in a C + + program create, destroy, refer to, access, and manipulate objects. An object is a region of storage. [Note: A function is not an object, regardless of whether or not it occupies storage in the way that objects do. ] An object is created by a definition (3.1), by a new-expression (5.3.4) or by the implementation (12.2) when needed. The properties of an object are determined when the object is created. An object can have a name (clause 3). An object has a storage duration (3.7) which influences its lifetime (3.8). An object has a type (3.9). The term object type refers to the type with which the object is created.
Some objects are polymorphic (10.3); the implementation generates information associated with each such object that makes it possible to determine that object’s type during program execution. For other objects, the interpretation of the values found therein is determined by the type of the expressions (clause 5) used to
access them.

2 Objects can contain other objects, called sub-objects. A sub-object can be a member sub-object (9.2), a base class sub-object (clause 10), or an array element. An object that is not a sub-object of any other object is called a complete object.