C++ / File Processing-Hesap Bilgilerini Dosyaya Yazdırmak

#include<iostream>#include<string>
#include<fstream>
#include<iomanip>

using namespace std;





class ClientData {

 public:


 ClientData( int n= 0, string f= "", string l= "", double b= 0.0 )
 {
     setFirstName(f);
     setLastName(l);
     setAccountNumber(n);
     setBalance(b);
 }


 void setAccountNumber( int a )
 {
     accountNumber=a;
 }
 int getAccountNumber() const
 {
     return accountNumber;
 }


 void setLastName( string a )
 {
     const char *temp=a.data();
     int length=strlen(temp);
     strncpy(lastName, temp ,length);

     lastName[length]='\0';

 }
 string getLastName() const
 {
     return lastName;
 }

 void setFirstName( string firstNameString)
 {


     const char *firstNameValue = firstNameString.data();

     int length = strlen( firstNameValue );

     length = ( length < 10 ? length : 9 );

     strncpy( firstName, firstNameValue, length );



     firstName[ length ] = '\0';
 }
 string getFirstName() const
 {
     return firstName;
 }


 void setBalance( double a )
 {

     balance=a;
 }
 double getBalance() const
 {
     return balance;
 }

 private:
 int accountNumber;
 char lastName[ 15 ];
 char firstName[ 10 ];
 double balance;

 };


int main()
 {

    int accountNumber;

    char lastName[ 15 ];

    char firstName[ 10 ];

    double balance;

     ofstream outCredit( "credit.dat", ios::binary );




 if ( !outCredit )
 {

     cerr << "File could not be opened." << endl;

     exit( 1 );

 } 


 cout << "Enter account number " << "(1 to 100, 0 to end input)\n? ";



 ClientData client;

 cin >> accountNumber;
 client.setAccountNumber( accountNumber );

 while ( client.getAccountNumber() > 0 && client.getAccountNumber() <= 100 ) 
 {



    cout << "Enter lastname, firstname, balance\n? ";

    cin >> lastName;

    cin >> firstName;

    cin >> balance;



    client.setLastName( lastName );

    client.setFirstName( firstName );

    client.setBalance( balance );



    outCredit.seekp( ( client.getAccountNumber() - 1 ) *sizeof( ClientData ) );



    outCredit.write(reinterpret_cast< const char * >( &client ),sizeof( ClientData ) );


    cout << "Enter account number\n? ";

    cin >> accountNumber;

    client.setAccountNumber( accountNumber );

    ifstream ferid("credit.dat",ios::in);

    ferid.seekg(0,ios::beg);

    ferid.read(reinterpret_cast< char *>(&client),sizeof(ClientData));

    cout<<client.getFirstName()<<endl;

} 

 return 0;

 }