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/7_ch21/fig21_22.CPP | 68 ++++++++++++++++++++++++ 1 file changed, 68 insertions(+) create mode 100644 Bachelor/Prog2/Codebeispiele/7_ch21/fig21_22.CPP (limited to 'Bachelor/Prog2/Codebeispiele/7_ch21/fig21_22.CPP') diff --git a/Bachelor/Prog2/Codebeispiele/7_ch21/fig21_22.CPP b/Bachelor/Prog2/Codebeispiele/7_ch21/fig21_22.CPP new file mode 100644 index 0000000..5dc0f95 --- /dev/null +++ b/Bachelor/Prog2/Codebeispiele/7_ch21/fig21_22.CPP @@ -0,0 +1,68 @@ +// Fig. 21.22: fig21_22.cpp +// Standard library class map test program. +#include + +using std::cout; +using std::endl; + +#include // map class-template definition + +// define short name for map type used in this program +typedef std::map< int, double, std::less< int > > mid; + +int main() +{ + mid pairs; + + // insert eight value_type objects in pairs + pairs.insert( mid::value_type( 15, 2.7 ) ); + pairs.insert( mid::value_type( 30, 111.11 ) ); + pairs.insert( mid::value_type( 5, 1010.1 ) ); + pairs.insert( mid::value_type( 10, 22.22 ) ); + pairs.insert( mid::value_type( 25, 33.333 ) ); + pairs.insert( mid::value_type( 5, 77.54 ) ); // dupe ignored + pairs.insert( mid::value_type( 20, 9.345 ) ); + pairs.insert( mid::value_type( 15, 99.3 ) ); // dupe ignored + + cout << "pairs contains:\nKey\tValue\n"; + + // use const_iterator to walk through elements of pairs + for ( mid::const_iterator iter = pairs.begin(); + iter != pairs.end(); ++iter ) + cout << iter->first << '\t' + << iter->second << '\n'; + + // use subscript operator to change value for key 25 + pairs[ 25 ] = 9999.99; + + // use subscript operator insert value for key 40 + pairs[ 40 ] = 8765.43; + + cout << "\nAfter subscript operations, pairs contains:" + << "\nKey\tValue\n"; + + for ( mid::const_iterator iter2 = pairs.begin(); + iter2 != pairs.end(); ++iter2 ) + cout << iter2->first << '\t' + << iter2->second << '\n'; + + cout << endl; + + return 0; + +} // end main + +/************************************************************************** + * (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. * + *************************************************************************/ \ No newline at end of file -- cgit v1.2.3