标签：
看过C程序的返回值得处理过程，我们不妨先推测一下C+的返回值处理过程：总体与C的返回过程类似，只不过在上图复制1中并不是直接执行“位逐次拷贝”，而是调用拷贝构造函数(因为此时产生了新对象——temp)，在复制2的时候需要调用赋值运算符(因为此时没有新的对象产生)。下面我们进行验证。
class X
{
public:
X()
{cout<<"X()"<<endl;};< p="">
X(const X& x)
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cout<<"X(const X& x)"<<endl;< p="">
}
X& operator=(const X&)
{
cout<<"="<<endl;< p="">
return *this;
}
~X()
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原文地址：http://www.cnblogs.com/flzx300c/p/4430738.html
