cin, inheeritance

HI,

Im trying to get this to work, however i cannot and it is driving me crazy, what I have is a text file from which i am trying to read in the data into members of a base class, and two derived classes:

Base class:

Code:

---

class insurance: public date {
        private:
                string firstName;
                string lastName;
                char gender;
                date birthDate;
        protected:
                int total;
};

---

Derived class 1:

Code:

---

class car : public insurance {
        private:
                std::string manufacturer;
                std::string model;
                int year;
                std::string color;
                int size;

        public:
                car();
                car(std::string, std::string, int, std::string, int);

---

Derived class II:

Code:

---

class health : public insurance {
        private:
                int type;
                int coverage;
                int size;
        public:
                health();
                health (int,int,int);

---

main.cpp

Code:

---

  int MAX_SIZE = 100;
  car c[MAX_SIZE];
  health h[MAX_SIZE];

  while(inFile) {
    test types
      inFile >> type;
      if(type == 1) {
        inFile >> c[i];
        i++;
      }
      else if(type == 2) {
        inFile >> h[i];
        i++;
      }

---

What I am trying to do is read in lines of a file....

formatted like this:

Code:

---

2      James          Williams        M      3 12 1980      1      1

---

I have tried overloading >> eg.. for the car class using the following function

Code:

---

istream operator >>(istream &in, car &c) {
        in >> firstName >> lastName >> gender >> birthDate
                >> manufacturer >> model >> year >> color;
//      return in;
}

---

however I cannot seem to get it to work, if anyone has any ides, or sees anything im doing wrong please let me know, thanks in advance for any assistance.

Are you getting any errors at either compile or run-time? If so, please include them.

What is the program actually doing if it is working? I can't see where you are opening the file to read from, but I am sure you are openeing it successfully before calling the function?

I get various errors... , and yes I am successfully opening the file..

it starts out with something like this:

Code:

---

g++ -g -Wall -c car.cxx
car.cxx: In function `std::istream operator>>(std::istream&, car&)':
car.cxx:20: error: no match for 'operator>>' in 'operator>>(std::istream&,
  date&)(((+c) + 24)) >> c->car::manufacturer'
/usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.4/include/g++-v3/bits/istream.tcc:86: error: candidates
  are: std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT,
  _Traits>::operator>>(std::basic_istream<_CharT,
  _Traits>&(*)(std::basic_istream<_CharT, _Traits>&)) [with _CharT = char,
  _Traits = std::char_traits<char>]
/usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.4/include/g++-v3/bits/istream.tcc:92: error:
                  std::basic_istream<_CharT, _Traits>&
  std::basic_istream<_CharT, _Traits>::operator>>(std::basic_ios<_CharT,
  _Traits>&(*)(std::basic_ios<_CharT, _Traits>&)) [with _CharT = char, _Traits
  = std::char_traits<char>]

---

I assume this error means that I have not or am not using the overloaded operator correctly, or have not included it in my class properly?

With a slightly modified operator function defined in car.cpp:

Code:

---

istream operator >>(istream &in, car &c) {
        in >> c.firstName >> c.lastName >> c.gender >> c.birthDate
                >> c.manufacturer >> c.model >> c.year >> c.color;
//      return in;
}

---

Well, I've never overloaded >> myself, but I will say that it shuld be returning something... and your return is commented.

Another thing to try is to try doing it one at a time instead of in a large listing.

Make sure you included <string>. It looks like it cannot find the operator>> for the string class. I assume that your operator>> is a friend, because it is accessing private member variables. If not, it should be. Also, you should return istream& instead of istream, although that shouldn't be affecting your program right now.