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| author | Sven Eisenhauer <sven@sven-eisenhauer.net> | 2023-11-10 15:11:48 +0100 |
|---|---|---|
| committer | Sven Eisenhauer <sven@sven-eisenhauer.net> | 2023-11-10 15:11:48 +0100 |
| commit | 33613a85afc4b1481367fbe92a17ee59c240250b (patch) | |
| tree | 670b842326116b376b505ec2263878912fca97e2 /Bachelor/Prog2/Codebeispiele/4_ch14/Fig14_14.cpp | |
| download | Studium-master.tar.gz Studium-master.tar.bz2 | |
Diffstat (limited to 'Bachelor/Prog2/Codebeispiele/4_ch14/Fig14_14.cpp')
| -rw-r--r-- | Bachelor/Prog2/Codebeispiele/4_ch14/Fig14_14.cpp | 91 |
1 files changed, 91 insertions, 0 deletions
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 <iostream>
+
+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 <iomanip>
+
+using std::setprecision;
+using std::setw;
+
+#include <fstream>
+
+using std::ifstream;
+using std::ostream;
+
+#include <cstdlib>
+#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. *
+ *************************************************************************/
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