Помогите, че не так в данном классе (С++)

Ругается, что несколько конструкторов по умолчанию

#include "header.h"

class Book {
public:
Book();
Book(const Book &book);
Book(const char Name[100] = "-", const char Theme[100] = "-", const char Author[100] = "-", const char Publisher[100] = "-", const int Year = 0, const int Pages = 0, const int Price = 0);
~Book();

void input();
void output();


char mName[100];
char mAuthor[100];
char mPublisher[100];

protected:
void enterDate(char*);

char mTheme[100];
int mYear;
int mPages;

private:
void printDate(const char*, WORD);

int mPrice;
};

C

#include "header.h"



class Book {

public:

    Book();

    Book(const Book &book);

    Book(const char Name[100] = "-", const char Theme[100] = "-", const char Author[100] = "-", const char Publisher[100] = "-", const int Year = 0, const int Pages = 0, const int Price = 0);

    ~Book();

    

    void input();

    void output();

    

    

    char mName[100];

    char mAuthor[100];

    char mPublisher[100];



protected:

    void enterDate(char*);



    char mTheme[100];

    int mYear;

    int mPages;



private:

    void printDate(const char*, WORD);



    int mPrice;

};