[您好,我正在为一个学校项目工作,终端中的编译器似乎给了我错误'未定义对我班级的引用。它与ctor和默认ctor有关吗?对于如何解决这个问题,有任何的建议吗?谢谢!
#include <iostream>
using namespace std;
class Sports{
public:
Sports();
Sports(int players, int medals = 0){
m_players = players;
m_medals = medals;
}
int getPlayers(){return m_players;}
bool getMedals(){return m_medals;}
friend bool compare(const Sports & lhs, const Sports & rhs){
return(lhs.m_players == lhs.m_players && rhs.m_medals == rhs.m_medals);
}
protected:
int m_players;
//private:
int m_medals;
};
class Tennis : public Sports{
public:
Tennis(bool experience){
m_experience = experience;
}
void RemovePlayers(){m_players--;}
void AddMedals(){m_medals++;}
private:
bool m_experience;
};
int main(){
Tennis t1;
return 0;
}
Tennis
的唯一构造函数需要一个bool
。但是,您尝试构造一个名为Tennis
的t1
,而不将bool
传递给构造函数。
而且,您说的是Sports
的构造函数,不带任何参数。但是没有一个。