本文实例讲述了C++实现的链表类。分享给大家供大家参考。具体如下:
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#include <iostream>
using namespace std;
class linklist
{
private :
struct node
{
int data;
node *link;
}*p;
public :
linklist();
void append( int num );
void add_as_first( int num );
void addafter( int c, int num );
void del( int num );
void display();
int count();
~linklist();
};
linklist::linklist()
{
p=NULL;
}
void linklist::append( int num)
{
node *q,*t;
if ( p == NULL )
{
p = new node;
p->data = num;
p->link = NULL;
}
else
{
q = p;
while ( q->link != NULL )
q = q->link;
t = new node;
t->data = num;
t->link = NULL;
q->link = t;
}
}
void linklist::add_as_first( int num)
{
node *q;
q = new node;
q->data = num;
q->link = p;
p = q;
}
void linklist::addafter( int c, int num)
{
node *q,*t;
int i;
for (i=0,q=p;i<c;i++)
{
q = q->link;
if ( q == NULL )
{
cout<< "\nThere are less than " <<c<< " elements." ;
return ;
}
}
t = new node;
t->data = num;
t->link = q->link;
q->link = t;
}
void linklist::del( int num )
{
node *q,*r;
q = p;
if ( q->data == num )
{
p = q->link;
delete q;
return ;
}
r = q;
while ( q!=NULL )
{
if ( q->data == num )
{
r->link = q->link;
delete q;
return ;
}
r = q;
q = q->link;
}
cout<< "\nElement " <<num<< " not Found." ;
}
void linklist::display()
{
node *q;
cout<<endl;
for ( q = p ; q != NULL ; q = q->link )
cout<<endl<<q->data;
}
int linklist::count()
{
node *q;
int c=0;
for ( q=p ; q != NULL ; q = q->link )
c++;
return c;
}
linklist::~linklist()
{
node *q;
if ( p == NULL )
return ;
while ( p != NULL )
{
q = p->link;
delete p;
p = q;
}
}
int main()
{
linklist ll;
cout<< "No. of elements = " <<ll.count();
ll.append(12);
ll.append(13);
ll.append(23);
ll.append(43);
ll.append(44);
ll.append(50);
ll.add_as_first(2);
ll.add_as_first(1);
ll.addafter(3,333);
ll.addafter(6,666);
ll.display();
cout<< "\nNo. of elements = " <<ll.count();
ll.del(333);
ll.del(12);
ll.del(98);
cout<< "\nNo. of elements = " <<ll.count();
return 0;
}
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希望本文所述对大家的C++程序设计有所帮助。