数据结构链表有关问题

数据结构链表问题
我有个很棘手的问题啊，请各位帮帮忙！#include<iostream>
using namespace std;
class intsllnode
{
public:
  int c,e;
  intsllnode *next;
public:
  intsllnode(int a,int b,intsllnode*ptr)
  {
  c=a;
  e=b;
  next=ptr;
  }
  intsllnode(){}
};
class intsllist
{
private:
  intsllnode*head,*tail,*f1,*f2,*f3;//f1,f2代表的是两个要相加的多项式，f3代表的是结果函数 
  //intsllist*s;
  void paixu(intsllnode*ptr);//根据x的指数从小到大排序 
public:
  intsllist(){}
  void creat();
  void intserttof1(int a,int b);//插入数到f1;
  void intserttof2(int a,int b);//插入数到f2;
  void addtof3();//进行相加得到f3; 
  void show();
};
void intsllist::paixu(intsllnode*ptr)//ptr只的是某个函数如f1,f2 
{
intsllnode*n,*m;
n=ptr->next;
m=n->next;
while(n!=NULL)
{
while(n->e>m->e)
{
intsllnode t;
t=*n;
*n=*m;
*m=t;
m=m->next;
}
n=n->next;
}
}
void intsllist::creat()
{
intsllist *s;
s=new intsllist();
}
void intsllist::intserttof1(int a,int b)
{
intsllnode*j;//*p,
//p=new intsllnode();
f1=new intsllnode();
//s=new intsllist();
//s->f1=p;//p设为链表的头节点 
j=new intsllnode();
j->c=a;
j->e=b;
if(head=tail=0)
head=tail=j;
else
{
f1->next=j;
//p->next=j;
j->next=head;
head=j;
}
}
void intsllist::intserttof2(int a,int b)
{
//s=new intsllist();
intsllnode*j;//*q,
f2=new intsllnode();
//q=new intsllnode();
//s->f2=q;//p设为链表的头节点 
j=new intsllnode();
j->c=a;
j->e=b;
//q->next=j;
f2->next=j;
j->next=head;
head=j;
}
void intsllist::addtof3()
{
intsllnode*x,*y;//*l;
int a;
//s=new intsllist();
//l=new intsllnode();
//s->f3=l;
f3=new intsllnode();
x=f1->next;
y=f2->next;
while(x!=NULL&&y!=NULL)
{
if(x->e==y->e)
f3->c=x->c+y->c;
else if(x->e>y->e)
  {
  while(x->e!=y->e&&x->e>y->e)
  {
  y=y->next;
  f3->c=y->c;
  f3=f3->next;
  }
  if(x->e==y->e)
  f3->c=x->c+y->c;
  else
  f3->c=x->c;
  }
  else if(x->e<y->e)
  {
  while(x->e!=y->e&&x->e<y->e)
  {
  x=x->next;
  f3->c=x->c;
  f3=f3->next;
  }
  if(x->e==y->e)
  f3->c=x->c+y->c;
  else
  f3->c=y->c;
  }
x=x->next;
y=y->next;
}
}
void intsllist::show()
{
intsllnode*i;
i=f3;
cout<<"所有结果为";
while(i!=NULL)
{
if(i->c==0)
delete i;
else
cout<<i->c<<i->e;
i=i->next;
}
} 
int main()
{
  intsllist *k;int a,b;
  k->creat();
  cout<<"输入f1的x的系数和指数"<<endl; 
  cin>>a>>b;
  cout<<"ok"<<endl;
  k->intserttof1(a,b); 
  k->show(); 
  cout<<"输入f2的x的系数和指数"<<endl;
  cin>>a>>b;
  k->intserttof2(a,b);
  k->show(); 
  k->addtof3();
  k->show();