From 33613a85afc4b1481367fbe92a17ee59c240250b Mon Sep 17 00:00:00 2001 From: Sven Eisenhauer Date: Fri, 10 Nov 2023 15:11:48 +0100 Subject: add new repo --- Bachelor/Prog2/Codebeispiele/4_ch14/Fig14_14.cpp | 91 ++++++++++++++++++++++++ 1 file changed, 91 insertions(+) create mode 100644 Bachelor/Prog2/Codebeispiele/4_ch14/Fig14_14.cpp (limited to 'Bachelor/Prog2/Codebeispiele/4_ch14/Fig14_14.cpp') diff --git a/Bachelor/Prog2/Codebeispiele/4_ch14/Fig14_14.cpp b/Bachelor/Prog2/Codebeispiele/4_ch14/Fig14_14.cpp new file mode 100644 index 0000000..6a9728e --- /dev/null +++ b/Bachelor/Prog2/Codebeispiele/4_ch14/Fig14_14.cpp @@ -0,0 +1,91 @@ +// Fig. 14.14: fig14_14.cpp +// Reading a random access file. +#include + +using std::cout; +using std::endl; +using std::ios; +using std::cerr; +using std::left; +using std::right; +using std::fixed; +using std::showpoint; + +#include + +using std::setprecision; +using std::setw; + +#include + +using std::ifstream; +using std::ostream; + +#include +#include "clientData.h" // ClientData class definition + +void outputLine( ostream&, const ClientData & ); + +int main() +{ + ifstream inCredit( "credit.dat", ios::in ); + + // exit program if ifstream cannot open file + if ( !inCredit ) { + cerr << "File could not be opened." << endl; + exit( 1 ); + + } // end if + + cout << left << setw( 10 ) << "Account" << setw( 16 ) + << "Last Name" << setw( 11 ) << "First Name" << left + << setw( 10 ) << right << "Balance" << endl; + + ClientData client; // create record + + // read first record from file + inCredit.read( reinterpret_cast< char * >( &client ), + sizeof( ClientData ) ); + + // read all records from file + while ( inCredit && !inCredit.eof() ) { + + // display record + if ( client.getAccountNumber() != 0 ) + outputLine( cout, client ); + + // read next from file + inCredit.read( reinterpret_cast< char * >( &client ), + sizeof( ClientData ) ); + + } // end while + + return 0; + +} // end main + +// display single record +void outputLine( ostream &output, const ClientData &record ) +{ + output << left << setw( 10 ) << record.getAccountNumber() + << setw( 16 ) << record.getLastName().data() + << setw( 11 ) << record.getFirstName().data() + << setw( 10 ) << setprecision( 2 ) << right << fixed + << showpoint << record.getBalance() << endl; + +} // end outputLine + +/************************************************************************** + * (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice * + * Hall. All Rights Reserved. * + * * + * DISCLAIMER: The authors and publisher of this book have used their * + * best efforts in preparing the book. These efforts include the * + * development, research, and testing of the theories and programs * + * to determine their effectiveness. The authors and publisher make * + * no warranty of any kind, expressed or implied, with regard to these * + * programs or to the documentation contained in these books. The authors * + * and publisher shall not be liable in any event for incidental or * + * consequential damages in connection with, or arising out of, the * + * furnishing, performance, or use of these programs. * + *************************************************************************/ -- cgit v1.2.3