问题描述
在c ++中使函数虚拟化时，我必须在哪里写"virtual"关键字?如果我编写虚拟int function_name而不是像Java中那样编写int virtual function_name会有所不同
While making a function virtual in c++ where do I have to write "virtual" keyword? Does it make a difference if I write virtual int function_name instead of int virtual function_name like in java
推荐答案
在函数声明中，在函数名称之前，任何属性说明符之后以及其他说明符(包括函数的返回类型的类型说明符).
In the function declaration, before the function name, and after any attribute specifiers, along with the other specifiers (including the type specifier for the function's return type).
声明的一般语法是
simple-declaration:
decl-specifier-seq<opt> init-declarator-list<opt> ;
attribute-specifier-seq decl-specifier-seq<opt> init-declarator-list ;
其中virtual(一个功能说明符)和返回类型(一个 type-specifier )都是 decl-specifier-seq的一部分，并且声明的名称是 init-declarator-list 的一部分.
where both virtual (a function-specifier) and the return type (a type-specifier) are part of the decl-specifier-seq, and the name being declared is part of the init-declarator-list.
不，说明符的顺序没有区别.
No, the order of the specifiers makes no difference.
但是，如果将virtual放在类型说明符之后，您可能会感到有些惊讶，因为将它放在前面更为常见.直到我回答了这个问题，我才知道你能做到这一点.
However, you might surprise some people if you put virtual after the type specifier, since it's more common to put it before. I didn't know you could do that until I answered this question.
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