c++ - Unhandled exception: Access violation reading location 0x00474EB4 -

i complete beginner in c++, , asked things way more difficult have learned.

i trying read information binary file, (infofile.dat) , display on console.

the program reading info , displaying on console no problem, , can continue using program normally.

however, after exit program using: return exit_success window appears , error shows:

unhandled exception @ 0x542fccc8 (msvcp110d.dll) in pcp.exe:  0xc0000005: access violation reading location 0x00474eb4. 

the error shows when try reading file, not writing. , when exit program using return exit_success or exit(1) (not when close console window x button)

please know have googled, looked @ many question in stackoverflow same error, none of them helped

code:

display function:

driverobj object of class driver

void staff::displaydriver(){  int i=1; ifstream fp1; fp1.open("infofile.dat",ios::binary); if(fp1.is_open()){     while(!fp1.eof())     {         fp1.read((char*)&driverobj,(sizeof(driverobj)));         cout << << ". ";         driverobj.showdriver();         i++;     } } else{     cout << "file not found!" << endl; }  fp1.close(); } 

show function

void driver::showdriver(){     cout << "id: " << id << " - name: " << name << " - zipcode: " << zipcode << " - phone: " << phone << endl; } 

driver class

class driver : public user {  protected:     string name;     long phone;     int id, zipcode;     vehicle vehicle;  public:     driver();     driver(int,string,int ,long , vehicle);     void showdriver();     int getid(); }; 

also, visual studio shows me in "xutility" after breaks:

*_pnext != 0; *_pnext = (*_pnext)->_mynextiter)  (*_pnext)->_myproxy = 0;