对构造函数、拷贝构造函数和赋值操作符调用的简单回顾
本文只是测试构造函数、拷贝构造函数和赋值操作符的调用问题，不涉及这些函数内的具体实现，所以多包涵

还有如果觉得有不足之处还望指出，谢谢…………

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Objected is constructed.(参数)
Objected is constructed.(无参数)
Object is copied. ? ? ? ? ? //每次传参都会构建临时对象
getO
Object is copied.
Object is destructed.
Object is operator =.
Object is destructed.
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Object o2 = getObject(o):
Object is copied.
getO
Object is copied.
Object is destructed.
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o1 = getObject(o):
Object is copied.
getO
Object is copied.
Object is destructed.
Object is operator =.
Object is destructed.
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getObject1:
Objected is constructed.(无参数)
getO1
Object is copied.
Object is operator =.
Object is destructed.
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Object o22 = getObject(o):
getO1
Object is copied.
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o11 = getObject(o):
Object is copied.
getO
Object is copied.
Object is destructed.
Object is operator =.
Object is destructed.
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getObject2:
Objected is constructed.(无参数)
getO2
Object is operator =.
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Object o222 = getObject(o):
getO2
Object is copied.
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o111 = getObject(o):
Object is copied.
getO
Object is copied.
Object is destructed.
Object is operator =.
Object is destructed.
end

拷贝构造函数和赋值操作符：同样是利用现有对象的值，生成/更新另一个对象的值。区别在于：拷贝构造函数是去完成对未初始化的存储区的初始化，而赋值操作符则是处理一个已经存在的对象。对一个对象赋值，当它一次出现时，它将调用拷贝构造函数，以后每次出现，都调用赋值操作符。
定义对象a，并用另一个对象b对a进行初始化时，若没有拷贝构造函数时，那么编译器会自动生成一个T b(1);//假设对象b已经初始化T a(b);//初始化阶段，调用拷贝构造函数T c = b;//虽然使用了“=”，但是初始化阶段，仍调用拷贝构造函数c = a; //因为对象c已经定义，所以此处调用赋值操作符重载函数。如果没有编译器会自动生成一个。?
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