这是我将两个链表合并在一起的代码。当我运行它时,我得到一个分段错误和核心转储错误。我不知道如何解决它。我的大脑被炸了,请帮忙。
#include<iostream>
using namespace std;
struct node
{
int data;
struct node *next;
};
class list
{
struct node *start;
public:
void create();
void show();
void merge(list,list);
};
void list::create()
{
struct node *nxt_node, *pre_node;
int value, no, i;
start=nxt_node=pre_node=NULL;
cout<<"\nHow many nodes:";
cin>>no;
cout<<"Enter "<<no<<" Eelements:";
for(i=1;i<=no;i++)
{
cin>>value;
nxt_node=new node;
nxt_node->data=value;
nxt_node->next=NULL;
if (start==NULL)
start=nxt_node;
else
pre_node->next=nxt_node;
pre_node=nxt_node;
}
}
void list::show()
{
struct node *ptr=start;
while(ptr!=NULL)
{
cout<<ptr->data<<"->'";
ptr=ptr->next;
}
}
void list::merge(list l1,list l2)
{
struct node *nxt_node, *pre_node, *pptr, *qptr;
int dat;
pptr=l1.start;
qptr=l2.start;
start=nxt_node=pre_node=NULL;
while(pptr!=NULL && qptr!=NULL)
{
if(pptr->data<=qptr->data)
{
dat=pptr->data;
pptr=pptr->next;
}
else
{
dat=qptr->data;
qptr=qptr->next;
}
nxt_node=new node;
nxt_node->data=dat;
nxt_node->next=NULL;
if(start==NULL)
{
start=nxt_node;
}
else
{
pre_node->next=nxt_node;
pre_node=nxt_node;
}
}
if(pptr==NULL)
{
while(qptr!=NULL)
{
nxt_node=new node;
nxt_node->data=qptr->data;
nxt_node->next=NULL;
if(start==NULL)
start=nxt_node;
else
pre_node->next=nxt_node;
pre_node=nxt_node;
qptr=qptr->next;
}
}
else if (qptr==NULL)
{
while(pptr!=NULL)
{
nxt_node=new node;
nxt_node->data=pptr->data;
nxt_node->next=NULL;
if(start==NULL)
start=nxt_node;
else
pre_node->next=nxt_node;
pre_node=nxt_node;
pptr=pptr->next;
}
}
}
int main()
{
list l1,l2,l3;
cout<<"Enter the first list in ascending order.";
l1.create();
cout<<"Enter the Second list in ascending order.";
l2.create();
cout<<"The first list is:"<<endl;
l1.show();
cout<<"The second list is"<<endl;
l2.show();
l3.merge(l1,l2);
l3.show();
return (0);
}