如何用C++编写构造函数？

Question

你能帮我用C++写作吗？ 我有类用户，谁载： User.h

class User 
{ 
public: 
    std::string getName(); 
    void changeName(std::string nName); 
    std::string getGroup(); 
    void changeGroup(std::string nGroup); 

    User(std::string nName, std::string nGroup); 
    ~User(void); 
private: 
    std::string name; 
    std::string group; 
}; 

现在我定义类蜜罐：

Honeypot.h：

class Honeypot 
{ 
public: 
    User us; 

我有构造函数：

Honeypot (std::string name, std::string ip, int numberOfInterfaces, std::string os); 

in Honeypot.cpp：

Honeypot::Honeypot(std::string name, std::string ip, int numberOfInterfaces, std::string os):us(nName, nGroup){ 
    this->name = name; 
    this->ip = ip; 
    this-> numberOfInterfaces = numberOfInterfaces; 
    this->os = os; 
} 

但是这种语法不正确。错误是：

IntelliSense: expected a ')', 'nGroup' : undeclared identifier and more on line :us(nName, nGroup){... 

谢谢你的帮忙。

Answer 1

nName和nGroup需要是Honeypot构造函数的参数;正如编译器指出的那样，它们是未声明的。

Honeypot::Honeypot(std::string name, std::string ip, 
        int numberOfInterfaces, std::string os, 
        std::string userName, std::string userGroup) 
    : us(userName, userGroup) 
{ 
    this->name = name; 
    this->ip = ip; 
    this->numberOfInterfaces = numberOfInterfaces; 
    this->os = os; 
}