两个一元多项式相加

程序运行结果如下：

# include

# include
struct node
{
	int exp;
	float coef;
	struct node *next; /*指向结构体指针*/ 
};
typedef struct node ListNode;
ListNode *createpoly() //创建多项式链表 
{
  ListNode *h=NULL,*p,*q=NULL;
  int e;
  float c;
  printf("请输入系数和指数:");
  scanf("%f,%d",&c,&e);
  while(e!=0||c!=0)
  {
  	p=(ListNode*)malloc(sizeof(ListNode));
  	p->coef=c;
  	p->exp=e;
  	p->next=NULL;
  	if(h==NULL)
  	h=p;
  	else
  	q->next=p;
  	q=p;
  	printf("请输入系数和指数:");
  	scanf("%f,%d",&c,&e);
	  }	
	  return h;
}
void disppoly(ListNode *h)
/*输出多项式*/
{
	ListNode *p;
	p=h;
	while(p!=NULL)
	{
		if(p->exp==0)
		printf("%.2f",p->coef);
		else
		printf("%fx^%d",p->coef,p->exp);
		p=p->next;
		if(p!=NULL)
		printf("+");
	}
	printf("\n");
 } 
 ListNode *addpoly(ListNode *h1,ListNode *h2)
 /*将两个多项式相加*/
 {
 	ListNode *p,*r=NULL,*s1,*s2,*s=NULL;
 	float c;
 	int e;
 	s1=h1;
 	s2=h2;
 	while(s1!=NULL&&s2!=NULL)
 	{
 		if(s1->exp==s2->exp)
 		{
 			c=s1->coef+s2->coef;
 			e=s1->exp;
 			s1=s1->next;
 			s2=s2->next;
		 }
		 else if(s1->exp>s2->exp)
		 {
		 	c=s1->coef;
		 	e=s1->exp;
		 	s1=s1->next;
		 }
		 else
		 {c=s2->coef;
		 e=s2->exp;
		 s2=s2->next;
		 }
		 if(c!=0)
		 {
		 	p=(ListNode*)malloc(sizeof(ListNode));
		 	p->coef=c;
		 	p->exp=e;p->next=NULL;
		 	if(s==NULL)
		 	s=p;
		 	else
		 	r->next=p;
		 	r=p;
		 }
	 }
	 while(s1!=NULL)
	 {
	 	c=s1->coef;
	 	e=s1->exp;
	 	s1=s1->next;
	 	if(c!=0)
	 	{
	 		p=(ListNode*)malloc(sizeof(ListNode));
		 	p->coef=c;
		 	p->exp=e;p->next=NULL;
		 	if(s==NULL)
		 	s=p;
		 	else
		 	r->next=p;
		 	r=p;
		 }
	 }
	 while(s2!=NULL)
	 {
	 	c=s2->coef;
	 	e=s2->exp;
	 	s2=s2->next;
	 	if(c!=0)
	 	{
	 		p=(ListNode*)malloc(sizeof(ListNode));
		 	p->coef=c;
		 	p->exp=e;p->next=NULL;
		 	if(s==NULL)
		 	s=p;
		 	else
		 	r->next=p;
		 	r=p;
		 }
	 }
	 return s;
  } 
void deletepoly(ListNode *h)
//释放多项式所占的内存单元 
{
	ListNode *p,*r=h;
	while(r!=NULL)
	{
		p=r->next;
		free(r);
		r=p;
	}
}
int main()
{
	ListNode *head1,*head2,*head;
	printf("创建第一个多项式:\n"); 
	head1=createpoly();
	printf("创建第二个多项式:\n");
	head2=createpoly();
	printf("将两个多项式相加:\n");
	head=addpoly(head1,head2);
	disppoly(head);
	deletepoly(head);
}