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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/7_ch21/fig21_22.CPP | |
| download | Studium-33613a85afc4b1481367fbe92a17ee59c240250b.tar.gz Studium-33613a85afc4b1481367fbe92a17ee59c240250b.tar.bz2 | |
Diffstat (limited to 'Bachelor/Prog2/Codebeispiele/7_ch21/fig21_22.CPP')
| -rw-r--r-- | Bachelor/Prog2/Codebeispiele/7_ch21/fig21_22.CPP | 68 |
1 files changed, 68 insertions, 0 deletions
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 <iostream>
+
+using std::cout;
+using std::endl;
+
+#include <map> // 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. *
+ *************************************************************************/
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