求解程序问题一员多项式加法函数（c写的）
#include<stdio.h>#include<stdlib.h>
#include<math.h> //多项式链表结点类型定义
typedef struct{
float coef; //系数
int expn; //指数
}DataType;
typedef struct node{
DataType data;
struct node *next;
}ListNode,*LinkList; //结点的位置查找
int q ; //定义一个全局量
int LocateNode(LinkList L,DataType e)
{
ListNode*p=L->next;
q=0; //纪录结点位置序号
while(p && e.expn<p->data.expn)
{ p=p->next;
q++;
}
//printf("%f,%d\n",e.expn!=p->data.expn);
if(p==NULL||e.expn!=p->data.expn)
return 0;
else
return 1;
}
//有序链表结点的插入
LinkList InsertNode(LinkList L ,DataType e)
{
ListNode *s,*p;
int i=0;
p=L;
while(p->next &&i<q)
{ p=p->next;
i++;
}
s=(ListNode*)malloc(sizeof(ListNode));
s->data.coef=e.coef;
s->data.expn=e.expn;
s->next=p->next;
p->next=s;
return L;
} //多项式链表的建立
LinkList CreatPolyn(int n)
{
LinkList pa;
int i;
DataType e;
pa=(ListNode*)malloc(sizeof(ListNode));//生成链表头结点
pa->next=NULL;
for(i=1;i<=n;i++)
{
scanf("%f,%d",&e.coef,&e.expn);
if(!LocateNode(pa,e)) //当前链表中不存在该指数项
pa=InsertNode(pa,e);
}
return pa;
} //多项式链表的输出
void PrintList(LinkList L)
{
ListNode *p;
p=L->next;
while(p)
{
printf("%c %fx^%d",(p->data.coef>0 ? '+' : ' '),p->data.coef,p->data.expn);
p=p->next;
}
printf("\n");
} //多项式的相加
LinkList AddPolyn(LinkList La,LinkList Lb)
{ //两个有序链表La和Lb表示多项式相加
ListNode *pa,*pb,*pc,*s;
LinkList Lc;
float sum;
pa=La->next; //pa和pb分别指向两个链表的开始结点
pb=Lb->next; //用La的头结点作为Lc的头结点
Lc=pc=La;
while(pa&&pb){
if(pa->data.expn>pb->data.expn){
pc->next=pa;pc=pa;pa=pa->next;
}
else if(pa->data.expn<pb->data.expn)
{ pc->next=pb;pc=pb;pb=pb->next;}
else{
sum=pa->data.coef+pb->data.coef;
if(fabs(sum)>1e-6){//系数和不为零
pa->data.coef=sum;
pc->next=pa;pc=pa;pa=pa->next;
s=pb;pb=pb->next;free(s);
}
else {
s=pa;pa=pa->next;free(s);
s=pb;pb=pb->next;free(s);
}
}
}
pc->next=pa ? pa : pb; //插入链表剩余部分
free(Lb); //释放Lb的头结点
return Lc;
}
//主控函数
void main()
{
LinkList La,Lb,Lc;
int n;
printf("输入第一个多项式的项数: ");
scanf("%d",&n);
printf("输入第一个多项式的每一项的系数，指数: \n");
La=CreatPolyn(La,n);
printf("第一个多项式为: ");
printList(La);
printf("输入第二个多项式的项数: ");
scanf("%d",&n);
printf("输入第二个多项式的每一项的系数，指数: \n");
Lb=CreatPolyn(Lb,n);
printf("第二个多项式为: ");
printList(Lb);
Lc=AddPolyn(La,Lb,Lc);
printf("\n相加后的为: ");
printList(Lc);
}
程序警告错误，不能运行，显示结果如下：
C:\Users\Administrator\Desktop\c1.c(109) : warning C4047: 'function' : 'int ' differs in levels of indirection from 'struct node *'
C:\Users\Administrator\Desktop\c1.c(109) : warning C4024: 'CreatPolyn' : different types for formal and actual parameter 1
C:\Users\Administrator\Desktop\c1.c(109) : warning C4020: 'CreatPolyn' : too many actual parameters
C:\Users\Administrator\Desktop\c1.c(111) : warning C4013: 'printList' undefined; assuming extern returning int
C:\Users\Administrator\Desktop\c1.c(115) : warning C4047: 'function' : 'int ' differs in levels of indirection from 'struct node *'
C:\Users\Administrator\Desktop\c1.c(115) : warning C4024: 'CreatPolyn' : different types for formal and actual parameter 1
C:\Users\Administrator\Desktop\c1.c(115) : warning C4020: 'CreatPolyn' : too many actual parameters
C:\Users\Administrator\Desktop\c1.c(118) : warning C4020: 'AddPolyn' : too many actual parameters
C:\Users\Administrator\Desktop\c1.c(109) : warning C4700: local variable 'La' used without having been initialized
C:\Users\Administrator\Desktop\c1.c(115) : warning C4700: local variable 'Lb' used without having been initialized
C:\Users\Administrator\Desktop\c1.c(118) : warning C4700: local variable 'Lc' used without having been initialized
c1.obj - 0 error(s), 0 warning(s)
求解释错处，并修改程序以能运行，新手请谅解
