virtual void和void virtual的区别
时间: 2024-05-29 21:15:23 浏览: 21
在C++中,`virtual`关键字用于实现多态性。`virtual`关键字通常用于类的成员函数声明中,以指示该函数可以被派生类覆盖。当一个基类指针指向一个派生类对象,并且调用了一个虚函数时,将会执行派生类的版本而不是基类的版本。
`virtual void`和`void virtual`都表示一个虚函数,但是它们的语法有所不同。`virtual void`表示该函数是一个虚函数且返回值类型为`void`,而`void virtual`表示该函数返回值类型为`void`且是一个虚函数。在实际使用中,这两种语法的效果是相同的,都会声明一个返回类型为`void`的虚函数。然而,在一些编码规范中,推荐使用`virtual void`的语法,因为它更符合语法结构的逻辑顺序。
相关问题
virtual void
"virtual void" 是 C++ 中的关键字,用于声明一个虚函数(virtual function)。虚函数是一种特殊的成员函数,它可以被派生类重写(override),并且在运行时根据对象的实际类型动态调用。虚函数使得 C++ 支持运行时多态(runtime polymorphism),是实现基于类的抽象和多态的关键技术之一。虚函数的声明格式为:virtual 返回类型 函数名(形参列表)。
virtual void_thiscall
"virtual void_thiscall" is not a valid phrase in the C++ language. However, "virtual" and "thiscall" are two keywords in C++.
"virtual" is used to declare a virtual function, which is a function that can be overridden by a derived class. When a virtual function is called through a pointer or reference to a base class, the actual function called is determined at runtime based on the dynamic type of the object.
"thiscall" is a calling convention used in C++ for non-static member functions. It specifies that the function should receive a pointer to the object on which it is called as its first argument (usually through the ECX register on x86 platforms).
So, in summary, "virtual void_thiscall" is not a valid C++ construct, but "virtual" and "thiscall" are two separate concepts in the language.
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