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| author | Fuwn <[email protected]> | 2024-04-07 23:18:32 -0700 |
|---|---|---|
| committer | Fuwn <[email protected]> | 2024-04-07 23:18:32 -0700 |
| commit | c1b6ffe70bd281c6c230fd63fabcaac2aff47514 (patch) | |
| tree | e8af3b1782a7cd0754590ed618fddc1bdb9b7385 /chapter10/bag6.h | |
| download | dscode-main.tar.xz dscode-main.zip | |
Diffstat (limited to 'chapter10/bag6.h')
| -rw-r--r-- | chapter10/bag6.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/chapter10/bag6.h b/chapter10/bag6.h new file mode 100644 index 0000000..8959658 --- /dev/null +++ b/chapter10/bag6.h @@ -0,0 +1,94 @@ +// FILE: bag6.h (part of the namespace main_savitch_10)
+// TEMPLATE CLASS PROVIDED: bag<Item>
+// (a container template class for a collection of items)
+//
+// TYPEDEFS for the bag<Item> class:
+// bag<Item>::value_type
+// bag<Item>::value_type is the data type of the items in the bag. It may
+// be any of the C++ built-in types (int, char, etc.), or a class with a
+// default constructor, a copy constructor, an assignment operator, and a
+// less-than operator forming a strict weak ordering.
+//
+// bag<Item>::size_type
+// bag<Item>::size_type is the data type of any variable that keeps track
+// of how many items are in a bag.
+//
+// CONSTRUCTOR for the bag<Item> class:
+// bag( )
+// Postcondition: The bag is empty.
+//
+// MODIFICATION MEMBER FUNCTIONS for the bag<Item> class:
+// size_type erase(const Item& target)
+// Postcondition: All copies of target have been removed from the bag. The
+// return value is the number of copies removed (which could be zero).
+//
+// bool erase_one(const Item& target)
+// Postcondition: If target was in the bag, then one copy of target has been
+// removed from the bag; otherwise the bag is unchanged. A true return value
+// indicates that one copy was removed; false indicates that nothing was
+// removed.
+//
+// void insert(const Item& entry)
+// Postcondition: A new copy of entry has been inserted into the bag.
+//
+// void operator +=(const bag& addend)
+// Postcondition: Each item in addend has been added to this bag.
+//
+// CONSTANT MEMBER FUNCTIONS for the bag<Item> class:
+// size_type size( ) const
+// Postcondition: Return value is the total number of items in the bag.
+//
+// size_type count(const Item& target) const
+// Postcondition: Return value is number of times target is in the bag.
+//
+// NONMEMBER FUNCTIONS for the bag class:
+// bag operator +(const bag& b1, const bag& b2)
+// Postcondition: The bag returned is the union of b1 and b2.
+//
+// VALUE SEMANTICS for the bag class:
+// Assignments and the copy constructor may be used with bag objects.
+//
+// DYNAMIC MEMORY USAGE by the bag:
+// If there is insufficient dynamic memory, then the following functions
+// throw bad_alloc: The constructors, insert, operator +=, operator +, and
+// the assignment operator.
+
+#ifndef BAG6_H
+#define BAG6_H
+#include <cstdlib> // Provides NULL and size_t
+#include "bintree.h" // Provides binary_tree_node and related functions
+
+namespace main_savitch_10
+{
+ template <class Item>
+ class bag
+ {
+ public:
+ // TYPEDEFS
+ typedef std::size_t size_type;
+ typedef Item value_type;
+ // CONSTRUCTORS and DESTRUCTOR
+ bag( );
+ bag(const bag& source);
+ ~bag( );
+ // MODIFICATION functions
+ size_type erase(const Item& target);
+ bool erase_one(const Item& target);
+ void insert(const Item& entry);
+ void operator +=(const bag& addend);
+ void operator =(const bag& source);
+ // CONSTANT functions
+ size_type size( ) const;
+ size_type count(const Item& target) const;
+ private:
+ binary_tree_node<Item> *root_ptr; // Root pointer of binary search tree
+ void insert_all(binary_tree_node<Item>* addroot_ptr);
+ };
+
+ // NONMEMBER functions for the bag<Item> template class
+ template <class Item>
+ bag<Item> operator +(const bag<Item>& b1, const bag<Item>& b2);
+}
+
+#include "bag6.template" // Include the implementation.
+#endif
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