源程序清单
#include "stdio.h"
#define LEN sizeof(struct term)
#define NULL 0
struct term{
int coef;/*系数*/
struct term *creatpolyn(void){
struct term *p1,*p2,*head;
int n,i;
scanf("%d",&n);
head=p1=p2=(struct term*)malloc(LEN);
printf("Decline the sequence importation according to the index number\n");/*按指数降序列输入*/
printf("Input the format is coef,expn \n");/*输入格式是 系数，指数*/
printf("input 1 term: ");
scanf("%d,%d",&p1->coef,&p1->expn);
for(i=2;i<=n;i++){
p1=(struct term*)malloc(LEN);
printf("input %d term:",i);
scanf("%d,%d",&p1->coef,&p1->expn);
p1->next=NULL;
p2->next=p1;
p2=p2->next;
}/*for*/
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n=n+1;
if(n==1){
if(p1->expn>p2->expn){
head=p3=p1;p1=p1->next;
}/*if*/
else if(p1->expn==p2->expn){
p1->coef=p1->coef+p2->coef;
if(p1->coef==0){
n=0;p1=p1->next;p2=p2->next;
if(!p1)head=p2;
if(!p2)head=p1;
if(!p1&&!p2){
printf("answer is 0\n");
head=NULL;}/*if*/
}/*if*/
else{
head=p3=p1;p1=p1->next;p2=p2->next;
}/*else*/
}/*else if*/
else{
head=p3=p2;p2=p2->next;
}/*else*/
}/*if*/
else{
if(p1->expn>p2->expn){
p3->next=p1;p1=p1->next;p3=p3->next;
}/*if*/
else if(p1->expn==p2->expn){
p1->coef=p1->coef+p2->coef;
if(p1->coef==0){
p1=p1->next;p2=p2->next;
} /*if*/
else{
p3->next=p1;p1=p1->next;p2=p2->next;p3=p3->next;
}/*else*/
}/*else if*/
else{
p3->next=p2;p2=p2->next;p3=p3->next;
}/*else*/
} /*else*/
}/*while*/
while(p1!=NULL){
p3->next=p1;p1=p1->next;p3=p3->next;
}/*while*/
while(p2!=NULL){
p3->next=p2;p2=p2->next;p3=p3->next;
}/*while*/
p3->next=NULL;
return(head);
}/*daapolyn*/
struct term *printpolyn(struct term *p){
int m=0;
while(p!=NULL){
m++;
printf("c%d=%d,e%d=%d\n",m,p->coef,m,p->expn);
p=p->next;
}/*while*/
printf("number=%d\n",m);
}/*printpolyn*/
main(){
struct term *p1,*p2,*head;
printf("Please input the first formula number: ");/*请输入第一个一元二项式项数*/
p1=creatpolyn();
printf("Please input the second formula number: ");/*请输入第二个一元二项式项数*/
p2=creatpolyn();
head=addpolyn(p1,p2);
printpolyn(head);
}/*main*/