IN UNIX: THIS IS MY CODE. I AM GETTING A SEGMENTATION ERROR INSTEAD OF READING THE FILE AND THAT IS THE ONLY PROBLEM I HAVE, SHOULD BE AN EASY...

IN UNIX: THIS IS MY CODE. I AM GETTING A SEGMENTATION ERROR INSTEAD OF READING THE FILE AND THAT IS THE ONLY PROBLEM I HAVE, SHOULD BE AN EASY PROBLEM TO FIX IF YOU KNOW CPP.

#include<iostream>

#include<string>

#include<fstream>

#include<cstring>

#include<cstdlib>

#include<map>

class Passwd{

  private:

    char user[50];

    int uid;

    int gid;

    char gecos[50];

    char home[50];

    char shell[50];

public:

    void setUid(int a){

        uid = a;

    }

    void setGid(int a){

        gid = a;

    }

    void setUser(char *a){

        strcpy(user,a);

    }

    void setGecos(char *a){

        strcpy(gecos,a);

    }

    void setHome(char *a){

        strcpy(home,a);

    }

    void setShell(char *a){

        strcpy(shell,a);

    }

    int getUid(){

        return uid;

    }

    int getGid(){

        return gid;

    }

    char *getGecos(){

        return gecos;

    }

    char *getHome(){

        return home;

    }

    char *getShell(){

        return shell;

    }

    char *getUser(){

        return user;

    }

};

using namespace std;

int main(){

  ifstream fin("passwd"); //thats the name of the file program is supposed to read. note that this program is executed in unix.

  ifstream fin1;

  ofstream fout;

  char user[50];

  int uid;

  int gid;

  char gecos[50];

  char home[50];

  char shell[50];

  map <int, int> passMap;

  map <int, int> :: iterator itr;

  if (!fin){

      cout << "Error oprning filen";

      return 0;

  }

  string str;

  Passwd data[100];

  Passwd data1[100];

  int count = 0;

  while (getline(fin,str)){

       char *ch;

       ch = strtok((char *)str.c_str(), ":");

       strcpy(user,ch);        

       ch = strtok(NULL, ":");

       ch = strtok(NULL, ":");

       uid = atoi(ch);

       ch = strtok(NULL, ":");

       gid = atoi(ch);

       ch = strtok(NULL, ":");

       strcpy(gecos,ch);

       ch = strtok(NULL, ":");

       strcpy(home,ch);

       ch = strtok(NULL, ":");

       strcpy(shell,ch);

       data[count].setUser(user);

       data[count].setUid(uid);

       data[count].setGid(gid);

       data[count].setGecos(gecos);

       data[count].setHome(home);

       data[count].setShell(shell);

       count++;

  }

  fin.close();

  for (int i = 0; i < count; i++){

      cout << "user:" << data[i].getUser() << endl;

      cout << "uid:" << data[i].getUid() << endl;

      cout << "gid:" << data[i].getGid() << endl;

      cout << "gecos:" << data[i].getGecos() << endl;

      cout << "home:" << data[i].getHome() << endl;

      cout << "shell:" << data[i].getShell() << endl;

      cout << "-------------------------------------------n";

  }

  fout.open("passwd.bin",ios::out|ios::binary);

  for (int i = 0; i < count; i++){

      fout.write((char *)&data[i],sizeof(data[i]));

  }

  fout.close();

  fin1.open("passwd.bin",ios::in|ios::binary);

  for (int i = 0; i < count; i++){

      fin1.read((char *)&data1[i],sizeof(data1[i]));

  }

  fin1.close();

  for (int i = 0; i < count; i++){

      cout << "user:" << data1[i].getUser() << endl;

      cout << "uid:" << data1[i].getUid() << endl;

      cout << "gid:" << data1[i].getGid() << endl;

      cout << "gecos:" << data1[i].getGecos() << endl;

      cout << "home:" << data1[i].getHome() << endl;

      cout << "shell:" << data1[i].getShell() << endl;

      cout << "-------------------------------------------n";

  }

  for (int i = 0; i < count; i++){

      passMap.insert(pair <int, int> (data1[i].getUid(), data1[i].getGid()));

  }

  for (itr = passMap.begin(); itr != passMap.end(); ++itr){

      cout << itr->first << " " << itr->second << endl;

  }

  cout << endl;

  return 0;

}