链表的cpp模板实现:
template <class T>
class ChainNode
{
friend Chain<T>;
private:
T data;
ChainNode<T> *link;
};
template<class T>
class Chain
{
public:
Chain(){first=0;}
~Chain();
bool IsEmpty() const{return first==0;}
int Length() const;
bool Find(int k,T& x)const;
int Search(const T&x) const;
Chain<T>& Delete(int k,T& x);
Chain<T>& Insert(int k,const T&x);
void Erase();
Chain<T>& Append(const T&x);
void Output(ostream &out)const;
private:
ChainNode<T> *first;
ChainNode<T> *last;
};
template<class T>
Chain<T>::~Chain()
{
ChainNode<T> *next;
while(first)
{
next=first->link;
delete first;
first=next;
}
}
template<class T>
int Chain<T>::Length()const
{
ChainNode<T> *current=first;
int len=0;
while(current)
{
len++;
current=current->link;
}
return len;
}
template <class T>
bool Chain<T>::Find(int k,T& x)const
{
if(k<1)return false;
ChainNode<T> *current=first;
int index=1;
while(index<k&¤t)
{
current=current->link;
index++;
}
if(current){x=current->data;return true;}
return false;
}
template<class T>
int Chain<T>::Search(const T&x)const
{
ChainNode<t>*current =first;
int index=1;
while(current&¤t->data!=x)
{
current=current->link;
index++;
}
if(current) return index;
return 0;
}
template <class T>
void Chain<T>::Output(ostream&out)const
{
ChainNode<T>* current;
for(current=first;current;current=current->link)
out<<current->data<<" ";
}
template <class T>
ostream& operator<<(ostream& out,const Chain<T>& x)
{
x.Output(out);
return out;
}
template <class T>
Chain<T>& Chain<T>::Delete(int k,T&x)
{
ChainNode<T> *p=first;
if(k==1)
first=first->link;
else
{
ChainNode<T>* q=first;
for(int index=1;index<k-1&&q;index++)
q=q->link;
p=q->link;
q->link=p->link;
}
x=p->data;
delete p;
return *this;
}
template<class T>
Chain<T>& Chain<T>::Insert(int k,const T& x)
{
ChainNode<T>*p=first;
for(int index=1;index<k&&p;index++)
p=p->link;
ChainNode<T> *y=new ChainNode<T>;
y->data=x;
if(k)
{
y->link=p->link;
p->link=y;
}
else
{
y->link=first;
first=y;
}
if(!y->link)
last=y;
return *this;
}
template<class T>
void Chain<T>::Erase()
{
ChainNode<T> *next;
while(first)
{
next=first->link;
delete first;
first=next;
}
}
template<class T>
Chain<T> &Chain<T>::Append(const T&x)
{
ChainNode<T> *y;
y=new ChainNode<T>;
y->data=x;
y->link=0;
if(first)
{
last->link=y;
last=y;
}
else first=last=y;
return *this;
}
参考书:数据结构算法与应用-C++语言描述