Question

c++中关于类中类，继承与派生问题 报错为 error C2504: 'employee' : base class undefined

程序为
#include<iostream>
using namespace std;
#include<string.h>

class employee
{
protected:
char number[50];
char name[30];
char sexity[10];
char position[30];
double wage;
class Date
{
private:
int year;
int month;
int day;
public:
void SetYear(int year)
{
this->year=year;
}
void SetMonth(int month)
{
this->month=month;
}
void SetDay(int day)
{
this->day=day;
}
int GetYear()
{
return year;
}
int GetMonth()
{
return month;
}
int GetDay()
{
return day;
}
};
public:
employee(char* number,char* name,char* sexity,char* position,int year,int month,int day)
{
strcpy(this->number,number);
strcpy(this->name,name);
strcpy(this->sexity,sexity);
strcpy(this->position,position);
Date::SetYear(year);
Date::SetMonth(month);
Date::SetDay(day);
}
employee()
{
number=0;
name=jiangwei;
sexity=male;
position=employee;
wage=1500;
Date::year=1994;
Date::month=7;
Date::day=28;
}
employee(char* number=0,char* name="jiangwei",char* sexity="male",char* position="employee",int year=1994,int month=7,int day=28,double wage=0)
{
strcpy(this->number,number);
strcpy(this->name,name);
strcpy(this->sexity,sexity);
strcpy(this->position,position);
Date::SetYear(year);
Date::SetMonth(month);
Date::SetDay(day);
};

class technician : public employee
{
protected:
double worktime;
public:
technician(char* number,char* name,char* sexity,char* position,double worktime,int year,int month,int day) : employee(number,name,sexity,position,Date::year,Date::month,Date::day)
{
this->worktime=worktime;
}
void display()
{
wage=25*worktime;
cout<<"wage:"<<wage<<endl;
}
};

void main()
{
technian p1("123456","weng","male","director",8,1994,7,28);
p1.show();
}

完整报错为
error C2504: 'employee' : base class undefined
fatal error C1004: unexpected end of file found

Answer 1

#include<iostream>
using namespace std;
#include<string.h>
class employee
{
protected:
    char number[50];
    char name[30];
    char sexity[10];
    char position[30];
    double wage;
    class Date
    {
    private:
        static int year;
        static int month;
        static int day;
    public:
        Date() {}
        static void SetYear(int _year)
        {
            year= _year;
        }
        static void SetMonth(int _month)
        {
            month = _month;
        }
        static void SetDay(int _day)
        {
            day = _day;
        }
        static int GetYear()
        {
            return year;
        }
        static int GetMonth()
        {
            return month;
        }
        static int GetDay()
        {
            return day;
        }
    };
public:
    employee(char* number,char* name,char* sexity,char* position,int year,int month,int day)
    {
        strcpy(this->number,number);
        strcpy(this->name,name);
        strcpy(this->sexity,sexity);
        strcpy(this->position,position);
        Date::SetYear(year);
        Date::SetMonth(month);
        Date::SetDay(day);
    }
    employee(char* number="0",char* name="jiangwei",char* sexity="male",char* position="employee",int year=1994,int month=7,int day=28,double wage=0)
    {
        //number = new char[x];  ;
        strcpy(this->number,number);
        strcpy(this->name,name);
        strcpy(this->sexity,sexity);
        strcpy(this->position,position);
        Date::SetYear(year);
        Date::SetMonth(month);
        Date::SetDay(day);
    }
};
int employee::Date::year = 0;
int employee::Date::month = 0;
int employee::Date::day = 0;
class technician : public employee
{
protected:
    double worktime;
public:
    technician(char* number,char* name,char* sexity,char* position,double worktime,int year,int month,int day)
    {
        this->worktime=worktime;
    }
    void display()
    {
        wage=25*worktime;
        cout<<"wage:"<<wage<<endl;
    }
};
void main()
{
    technician p1("123456","weng","male","director",8,1994,7,28);
    p1.display();
}

仅供参考，继续交流！

Answer 2

#include<iostream>
using namespace std;
#include<string.h>
class Date
{
private:
    static int year;
    static int month;
    static int day;
public:
    static void SetYear(int _year)
    {
        year=_year;
    }
    static void SetMonth(int _month)
    {
        month=_month;
    }
    static void SetDay(int _day)
    {
        day=_day;
    }
    static int GetYear()
    {
        return year;
    }
    static int GetMonth()
    {
        return month;
    }
    static int GetDay()
    {
        return day;
    }
};
int Date::year = 0;
int Date::month = 0;
int Date::day = 0;
class employee
{
protected:
    char number[50];
    char name[30];
    char sexity[10];
    char position[30];
    double wage;
public:
    employee(char* number=0,char* name="jiangwei",char* sexity="male",char* position="employee",int year=1994,int month=7,int day=28,double wage=0)
    {
        strcpy(this->number,number);
        strcpy(this->name,name);
        strcpy(this->sexity,sexity);
        strcpy(this->position,position);
        Date::SetYear(year);
        Date::SetMonth(month);
        Date::SetDay(day);
    }
};
class technician : public employee
{
protected:
    double worktime;
public:
    technician(char* number,char* name,char* sexity,char* position,double worktime,int year,int month,int day) : employee(number,name,sexity,position,Date::GetYear(),Date::GetMonth(),Date::GetDay())
    {
        this->worktime=worktime;
    }
    void display()
    {
        wage=25*worktime;
        cout<<"wage:"<<wage<<endl;
    }
};
void main()
{
    technician p1("123456","weng","male","director",8,1994,7,28);
    p1.display();
}

----------------------------------------

只能说类设计得一塌糊涂，虽然我也好不了多少（1年前）。。

Answer 3

类雇员没有看到吗？

你这样做类？ ？