大家好我是一名大二的学生
正在做数据结构的课程设计，题目是一元多项式计算，c语言实现
要求：输入系数和指数，输出多项式，之后进行加减乘法运算
本人今天敲了一下午（纯手写纯自己编）
之后在笔记本的vs2012旗舰版上运行时，界面出现很多000还有很大的数之类的一直刷屏
我想了好久也不知道错在哪里，求各位牛人帮忙解决一下
代码：
#include<stdio.h>
#include<stdlib.h>
struct node
{int exp;
double coef;
node *next;};
void init_poly(node **head){
    node *p;
    p=(struct node*)malloc(sizeof(node));
    p->coef=-1;
    p->exp=-1;
    p->next=p;
    *head=p;
    return;
}
void prt_poly(node *head){
    node *p;
    if(head->next==head)
    {    printf("空表！");
    return;}
    p=head->next;
    printf("%fx^%d",p->coef,p->exp);
    p=p->next;
    while(p!=head){
        if(p->coef>0)
            printf("+%fx^%d",p->coef,p->exp);
        else printf("%fx^%d",p->coef,p->exp);
        p-p->next;
    }
    printf("\n");
    return;
}
void creat(node *head){
    node *k,*p;
    int e;
    double c;
    k=head;
    printf("请按降幂输入一元多项式，输入格式：系数〈空格〉指数〈空格〉系数〈空格〉指数。。。指数输入-1结束！\n");
    scanf("%f%d",&c,&e);
    while(e!=-1){
        p=(struct node*)malloc(sizeof(node));   
        p->exp=e;
        p->coef=c;
        p->next=head;
        k->next=p;
        k=p;
        scanf("%f%d",&c,&e);
    }
    return;
}
void del_poly(node *head){
    node *p,*q;
    p=head->next;
    while(p!=head){
        q=p;
        p=p->next;
        delete q;
    }
    p->next=head;
}
struct node* jiafa(node *head1,node *head2){
    node *k,*q,*m,*n;
    node *head;
    int e;double c;
    m=head1->next;
    n=head2->next;
    init_poly(&head);k=head;
    while((m->exp!=-1)||(n->exp!=-1)){
        if (m->exp==n->exp)
        {c=m->coef+n->coef;
        e=n->exp+m->exp;
        m=m->next;
        n=n->next;
        }
        else if (m->exp>n->exp)
        {c=m->coef;e=m->exp;
        m=m->next;}
        else {c=n->coef;e=n->coef;
        n=n->next;}
        if(c!=0)
        {q=(struct node*)malloc(sizeof(node));
        q->coef=c;q->exp=e;
        q->next=head;
        k->next=q;
        k=q;
        }
    }
    del_poly(head1);
    del_poly(head2);
    return(head);
}
struct node*chengfa(node*head1,node*head2){
    node *head,*head0;
    node *k,*q,*m,*n;
    m=head1->next;
    init_poly(&head0);
    init_poly(&head);
    while(m->exp!=-1){
        n=head2->next;
        k=head0;
        while(n->exp!=-1){
            q=(struct node*)malloc(sizeof(node));
            q->exp=m->exp+n->exp;
            q->coef=m->coef*n->coef;
            q->next=head0;
            k->next=q;
            k=q;
            n=n->next;
        }
        head=jiafa(head,head0);
        m=m->next;
    }
    del_poly(head1);
    del_poly(head2);
    return(head);
}
void main(){
    node *head1,*head2,*k;
    int flag=1,c;
    while(flag==1){
        printf("1.创建一个多项式        2.加法运算     3.减法运算      4.乘法运算        5.释放多项式        6.退出\n");
        printf("请输入要进行的选项:");scanf("%d",&c);
        switch(c){
        case 1:
            init_poly(&head1);creat(head1);
            printf("您输入的表达式为：");prt_poly(head1);break;
        case 2:printf("请再输入一个表达式:");
            init_poly(&head2);creat(head2);
            printf("您输入的表达式为：");prt_poly(head2);
            head1=jiafa(head1,head2);
            printf("二者相加后的表达式为：");prt_poly(head1);break;
        case 3:printf("请再输入一个表达式:");
            init_poly(&head2);creat(head2);
            printf("您输入的表达式为：");prt_poly(head2);
            k=head2->next;
            while(k!=head2){
                k->coef=(-1)*k->coef;
                k=k->next;
            }
            head1=jiafa(head1,head2);
            printf("二者相加减的表达式为：");prt_poly(head1);break;
        case 4:printf("请再输入一个表达式:");
            init_poly(&head2);creat(head2);
            printf("您输入的表达式为：");prt_poly(head2);
            head1=chengfa(head1,head2);
            printf("二者相加乘的表达式为：");prt_poly(head1);break;
        case 5:del_poly(head1);
            printf("一元多项式已经释放！请重新选择功能。");break;
        default:flag=0;break;
        }
    }
}