我需要用C++编写一些东西。我对虚拟功能有疑问。

例如,在头文件Human.h中,我具有以下内容:

class Human
{
    public:
        virtual int Age();
        Human();
        ~Human();
}

Human.cpp文件中,我有这个:
#include<iostream>
#include "Human.h"

int Human::Age()
{
    return 0;
}

我得到这些编译错误:
Error    4    error C2371: 'Human::Age' : redefinition; different basic types    c:\users\jan\desktop\testc\testc\human.cpp    5    1    TestC
Error    3    error C2556: 'Human Human::Age(void)' : overloaded function differs only by return type from 'int Human::Age(void)'    c:\users\jan\desktop\testc\testc\human.cpp    5    1    TestC
Error    2    error C2628: 'Human' followed by 'int' is illegal (did you forget a ';'?)    c:\users\jan\desktop\testc\testc\human.cpp    4    1    TestC

最佳答案

您忘记了用;结束类定义

它应该读

class Human
{
public:
    virtual int Age();
    Human();
    ~Human();
};

这可能会使错误消失。另外,请始终阅读编译器的输出:Error 2 error C2628: 'Human' followed by 'int' is illegal (did you forget a ';'?) c:\users\jan\desktop\testc\testc\human.cpp 4 1 TestC

关于c++ - 虚函数的C++问题,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/4724110/

10-11 10:31