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diff --git a/Bachelor/Prog2/Codebeispiele/7_ch21/fig21_18.CPP b/Bachelor/Prog2/Codebeispiele/7_ch21/fig21_18.CPP
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+++ b/Bachelor/Prog2/Codebeispiele/7_ch21/fig21_18.CPP
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+// Fig. 21.18: fig21_18.cpp
+// Standard library class deque test program.
+#include <iostream>
+
+using std::cout;
+using std::endl;
+
+#include <deque>      // deque class-template definition
+#include <algorithm>  // copy algorithm
+
+int main()
+{ 
+   std::deque< double > values;
+   std::ostream_iterator< double > output( cout, " " );
+
+   // insert elements in values
+   values.push_front( 2.2 );
+   values.push_front( 3.5 );
+   values.push_back( 1.1 );
+
+   cout << "values contains: ";
+
+   // use subscript operator to obtain elements of values
+   for ( int i = 0; i < values.size(); ++i )
+      cout << values[ i ] << ' ';
+
+   values.pop_front();  // remove first element
+
+   cout << "\nAfter pop_front, values contains: ";
+   std::copy( values.begin(), values.end(), output );
+
+   // use subscript operator to modify element at location 1
+   values[ 1 ] = 5.4;
+
+   cout << "\nAfter values[ 1 ] = 5.4, values contains: ";
+   std::copy( values.begin(), values.end(), output );
+   
+   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