在 C/C++ 中，不同的数据类型之间可以相互转换。无需用户指明如何转换的称为自动类型转换（隐式类型转换），需要用户显式地指明如何转换的称为强制类型转换。
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1.9.6 C++转换构造函数：将其它类型转换为当前类的类型
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- 2026-09-21
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1.9.4 C++重载=（赋值运算符）
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1.9.1 C++拷贝构造函数（复制构造函数）
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1.9.3 C++深拷贝和浅拷贝（深复制和浅复制）详解
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1.9 C++面向对象进阶教程
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