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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 /chapter3/bag1.h | |
| download | dscode-main.tar.xz dscode-main.zip | |
Diffstat (limited to 'chapter3/bag1.h')
| -rw-r--r-- | chapter3/bag1.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/chapter3/bag1.h b/chapter3/bag1.h new file mode 100644 index 0000000..907e58b --- /dev/null +++ b/chapter3/bag1.h @@ -0,0 +1,87 @@ +// FILE: bag1.h
+// CLASS PROVIDED: bag (part of the namespace main_savitch_3)
+//
+// TYPEDEF and MEMBER CONSTANTS for the bag class:
+// typedef ____ value_type
+// bag::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, an assignment operator, and operators to
+// test for equality (x == y) and non-equality (x != y).
+//
+// typedef ____ size_type
+// bag::size_type is the data type of any variable that keeps track of how many items
+// are in a bag.
+//
+// static const size_type CAPACITY = _____
+// bag::CAPACITY is the maximum number of items that a bag can hold.
+//
+// CONSTRUCTOR for the bag class:
+// bag( )
+// Postcondition: The bag has been initialized as an empty bag.
+//
+// MODIFICATION MEMBER FUNCTIONS for the bag class:
+// size_type erase(const value_type& 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).
+//
+// void erase_one(const value_type& target)
+// Postcondition: If target was in the bag, then one copy has been removed;
+// otherwise the bag is unchanged. A true return value indicates that one
+// copy was removed; false indicates that nothing was removed.
+//
+// void insert(const value_type& entry)
+// Precondition: size( ) < CAPACITY.
+// Postcondition: A new copy of entry has been added to the bag.
+//
+// void operator +=(const bag& addend)
+// Precondition: size( ) + addend.size( ) <= CAPACITY.
+// Postcondition: Each item in addend has been added to this bag.
+//
+// CONSTANT MEMBER FUNCTIONS for the bag class:
+// size_type size( ) const
+// Postcondition: The return value is the total number of items in the bag.
+//
+// size_type count(const value_type& target) const
+// Postcondition: The 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)
+// Precondition: b1.size( ) + b2.size( ) <= bag::CAPACITY.
+// 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.
+
+#ifndef MAIN_SAVITCH_BAG1_H
+#define MAIN_SAVITCH_BAG1_H
+#include <cstdlib> // Provides size_t
+
+namespace main_savitch_3
+{
+ class bag
+ {
+ public:
+ // TYPEDEFS and MEMBER CONSTANTS
+ typedef int value_type;
+ typedef std::size_t size_type;
+ static const size_type CAPACITY = 30;
+ // CONSTRUCTOR
+ bag( ) { used = 0; }
+ // MODIFICATION MEMBER FUNCTIONS
+ size_type erase(const value_type& target);
+ bool erase_one(const value_type& target);
+ void insert(const value_type& entry);
+ void operator +=(const bag& addend);
+ // CONSTANT MEMBER FUNCTIONS
+ size_type size( ) const { return used; }
+ size_type count(const value_type& target) const;
+ private:
+ value_type data[CAPACITY]; // The array to store items
+ size_type used; // How much of array is used
+ };
+
+ // NONMEMBER FUNCTIONS for the bag class
+ bag operator +(const bag& b1, const bag& b2);
+}
+
+#endif
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