28 lines
1012 B
C++
Executable File
28 lines
1012 B
C++
Executable File
#ifndef __TLIST_H
|
|
#define __TLIST_H
|
|
// tlist.h
|
|
// this is a base template class for lists
|
|
// it is for a list of elements. An element can be of any class, but it must
|
|
// have the operators == and = defined, so that the list can be searched
|
|
// also the operator >> must be defined for write
|
|
|
|
template <class Elem> class List {
|
|
public:
|
|
virtual Elem *Insert(const Elem &elem) {return NULL;}
|
|
// insert elem into the list
|
|
// returns a ptr to elem if elem inserted, NULL if elem was already there
|
|
// i.e. doesn't put in duplicates and returns NULL for duplicates
|
|
virtual Elem *Search(const Elem &elem) {return NULL;}
|
|
// finds the element that matchs elem and returns it. This allows assoc
|
|
// retrieval
|
|
// returns NULL if the elem is not found
|
|
virtual void Write(ostream &s) {;}
|
|
// writes out the list of elements. Requires that the element overload the
|
|
// stream output operator
|
|
virtual int Empty(void) {return 0;}
|
|
// returns true if the list is empty
|
|
};
|
|
|
|
#endif
|
|
|