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 --- .../Codebeispiele/6_ch17/fig17_03_05/fig17_05.cpp | 105 ++++++++++ .../Prog2/Codebeispiele/6_ch17/fig17_03_05/list.h | 216 +++++++++++++++++++++ .../Codebeispiele/6_ch17/fig17_03_05/listnode.h | 56 ++++++ 3 files changed, 377 insertions(+) create mode 100644 Bachelor/Prog2/Codebeispiele/6_ch17/fig17_03_05/fig17_05.cpp create mode 100644 Bachelor/Prog2/Codebeispiele/6_ch17/fig17_03_05/list.h create mode 100644 Bachelor/Prog2/Codebeispiele/6_ch17/fig17_03_05/listnode.h (limited to 'Bachelor/Prog2/Codebeispiele/6_ch17/fig17_03_05') diff --git a/Bachelor/Prog2/Codebeispiele/6_ch17/fig17_03_05/fig17_05.cpp b/Bachelor/Prog2/Codebeispiele/6_ch17/fig17_03_05/fig17_05.cpp new file mode 100644 index 0000000..4ca0d87 --- /dev/null +++ b/Bachelor/Prog2/Codebeispiele/6_ch17/fig17_03_05/fig17_05.cpp @@ -0,0 +1,105 @@ +// Fig. 17.5: fig17_05.cpp +// List class test program. +#include + +using std::cin; +using std::endl; + +#include + +using std::string; + +#include "list.h" // List class definition + +// function to test a List +template< class T > +void testList( List< T > &listObject, const string &typeName ) +{ + cout << "Testing a List of " << typeName << " values\n"; + + instructions(); // display instructions + + int choice; + T value; + + do { + cout << "? "; + cin >> choice; + + switch ( choice ) { + case 1: + cout << "Enter " << typeName << ": "; + cin >> value; + listObject.insertAtFront( value ); + listObject.print(); + break; + + case 2: + cout << "Enter " << typeName << ": "; + cin >> value; + listObject.insertAtBack( value ); + listObject.print(); + break; + + case 3: + if ( listObject.removeFromFront( value ) ) + cout << value << " removed from list\n"; + + listObject.print(); + break; + + case 4: + if ( listObject.removeFromBack( value ) ) + cout << value << " removed from list\n"; + + listObject.print(); + break; + + } // end switch + + } while ( choice != 5 ); // end do/while + + cout << "End list test\n\n"; + +} // end function testList + +// display program instructions to user +void instructions() +{ + cout << "Enter one of the following:\n" + << " 1 to insert at beginning of list\n" + << " 2 to insert at end of list\n" + << " 3 to delete from beginning of list\n" + << " 4 to delete from end of list\n" + << " 5 to end list processing\n"; + +} // end function instructions + +int main() +{ + // test List of int values + List< int > integerList; + testList( integerList, "integer" ); + + // test List of double values + List< double > doubleList; + testList( doubleList, "double" ); + + 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 diff --git a/Bachelor/Prog2/Codebeispiele/6_ch17/fig17_03_05/list.h b/Bachelor/Prog2/Codebeispiele/6_ch17/fig17_03_05/list.h new file mode 100644 index 0000000..bf97eb2 --- /dev/null +++ b/Bachelor/Prog2/Codebeispiele/6_ch17/fig17_03_05/list.h @@ -0,0 +1,216 @@ +// Fig. 17.4: list.h +// Template List class definition. +#ifndef LIST_H +#define LIST_H + +#include + +using std::cout; + +#include +#include "listnode.h" // ListNode class definition + +template< class NODETYPE > +class List { + +public: + List(); // constructor + ~List(); // destructor + void insertAtFront( const NODETYPE & ); + void insertAtBack( const NODETYPE & ); + bool removeFromFront( NODETYPE & ); + bool removeFromBack( NODETYPE & ); + bool isEmpty() const; + void print() const; + +private: + ListNode< NODETYPE > *firstPtr; // pointer to first node + ListNode< NODETYPE > *lastPtr; // pointer to last node + + // utility function to allocate new node + ListNode< NODETYPE > *getNewNode( const NODETYPE & ); + +}; // end class List + +// default constructor +template< class NODETYPE > +List< NODETYPE >::List() + : firstPtr( 0 ), + lastPtr( 0 ) +{ + // empty body + +} // end List constructor + +// destructor +template< class NODETYPE > +List< NODETYPE >::~List() +{ + if ( !isEmpty() ) { // List is not empty + cout << "Destroying nodes ...\n"; + + ListNode< NODETYPE > *currentPtr = firstPtr; + ListNode< NODETYPE > *tempPtr; + + while ( currentPtr != 0 ) { // delete remaining nodes + tempPtr = currentPtr; + cout << tempPtr->data << '\n'; + currentPtr = currentPtr->nextPtr; + delete tempPtr; + + } // end while + + } // end if + + cout << "All nodes destroyed\n\n"; + +} // end List destructor + +// insert node at front of list +template< class NODETYPE > +void List< NODETYPE >::insertAtFront( const NODETYPE &value ) +{ + ListNode< NODETYPE > *newPtr = getNewNode( value ); + + if ( isEmpty() ) // List is empty + firstPtr = lastPtr = newPtr; + + else { // List is not empty + newPtr->nextPtr = firstPtr; + firstPtr = newPtr; + + } // end else + +} // end function insertAtFront + +// insert node at back of list +template< class NODETYPE > +void List< NODETYPE >::insertAtBack( const NODETYPE &value ) +{ + ListNode< NODETYPE > *newPtr = getNewNode( value ); + + if ( isEmpty() ) // List is empty + firstPtr = lastPtr = newPtr; + + else { // List is not empty + lastPtr->nextPtr = newPtr; + lastPtr = newPtr; + + } // end else + +} // end function insertAtBack + +// delete node from front of list +template< class NODETYPE > +bool List< NODETYPE >::removeFromFront( NODETYPE &value ) +{ + if ( isEmpty() ) // List is empty + return false; // delete unsuccessful + + else { + ListNode< NODETYPE > *tempPtr = firstPtr; + + if ( firstPtr == lastPtr ) + firstPtr = lastPtr = 0; + else + firstPtr = firstPtr->nextPtr; + + value = tempPtr->data; // data being removed + delete tempPtr; + + return true; // delete successful + + } // end else + +} // end function removeFromFront + +// delete node from back of list +template< class NODETYPE > +bool List< NODETYPE >::removeFromBack( NODETYPE &value ) +{ + if ( isEmpty() ) + return false; // delete unsuccessful + + else { + ListNode< NODETYPE > *tempPtr = lastPtr; + + if ( firstPtr == lastPtr ) + firstPtr = lastPtr = 0; + else { + ListNode< NODETYPE > *currentPtr = firstPtr; + + // locate second-to-last element + while ( currentPtr->nextPtr != lastPtr ) + currentPtr = currentPtr->nextPtr; + + lastPtr = currentPtr; + currentPtr->nextPtr = 0; + + } // end else + + value = tempPtr->data; + delete tempPtr; + + return true; // delete successful + + } // end else + +} // end function removeFromBack + +// is List empty? +template< class NODETYPE > +bool List< NODETYPE >::isEmpty() const +{ + return firstPtr == 0; + +} // end function isEmpty + +// return pointer to newly allocated node +template< class NODETYPE > +ListNode< NODETYPE > *List< NODETYPE >::getNewNode( + const NODETYPE &value ) +{ + return new ListNode< NODETYPE >( value ); + +} // end function getNewNode + +// display contents of List +template< class NODETYPE > +void List< NODETYPE >::print() const +{ + if ( isEmpty() ) { + cout << "The list is empty\n\n"; + return; + + } // end if + + ListNode< NODETYPE > *currentPtr = firstPtr; + + cout << "The list is: "; + + while ( currentPtr != 0 ) { + cout << currentPtr->data << ' '; + currentPtr = currentPtr->nextPtr; + + } // end while + + cout << "\n\n"; + +} // end function print + +#endif + +/************************************************************************** + * (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. * + *************************************************************************/ diff --git a/Bachelor/Prog2/Codebeispiele/6_ch17/fig17_03_05/listnode.h b/Bachelor/Prog2/Codebeispiele/6_ch17/fig17_03_05/listnode.h new file mode 100644 index 0000000..325d5f1 --- /dev/null +++ b/Bachelor/Prog2/Codebeispiele/6_ch17/fig17_03_05/listnode.h @@ -0,0 +1,56 @@ +// Fig. 17.3: listnode.h +// Template ListNode class definition. +#ifndef LISTNODE_H +#define LISTNODE_H + +// forward declaration of class List +template< class NODETYPE > class List; + +template< class NODETYPE > +class ListNode { + friend class List< NODETYPE >; // make List a friend + +public: + ListNode( const NODETYPE & ); // constructor + NODETYPE getData() const; // return data in node + +private: + NODETYPE data; // data + ListNode< NODETYPE > *nextPtr; // next node in list + +}; // end class ListNode + +// constructor +template< class NODETYPE > +ListNode< NODETYPE >::ListNode( const NODETYPE &info ) + : data( info ), + nextPtr( 0 ) +{ + // empty body + +} // end ListNode constructor + +// return copy of data in node +template< class NODETYPE > +NODETYPE ListNode< NODETYPE >::getData() const +{ + return data; + +} // end function getData + +#endif + +/************************************************************************** + * (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