一元多项式的乘法C++

#include #include typedef struct term{  int z;   //指数  float x;     //系数  struct term *next; }term; struct term *creatlink();    //创建多项式 int cmp(int  a,int b);    //指数比较 struct term * addin(struct term *a,struct term *b);   //加法运算 void list(struct term *a); struct term *multiply(struct term *a,struct term *b); void main(){ struct term *A=creatlink(); list(A); struct term *B=creatlink(); list(B); struct term *D=multiply(A,B); cout< list(D); } struct term *multiply(struct term *a,struct term *b){ struct term *result=(struct term *)malloc(sizeof(struct term));result->next=NULL; struct term *i; struct term *h=(struct term *)malloc(sizeof(struct term));h- >next=NULL; struct term *j; struct term *r; for(i=a->next;i;i=i->next){     r=h;h=r;  for(j=b->next;j;j=j->next){  struct term *p=(struct term *)malloc(sizeof(struct term));  p->z=j->z+i->z;  p->x=j->x*i->x;     r->next=p;  r=p;    } r->next=NULL; addin(result,h); h->next=NULL; } return result; } void list(struct term *a){ struct term *aa; aa=a->next; while(aa){ cout<x<<"X"<z; if(aa->next!=0) cout<<"+"; aa=aa->next; } } struct term * addin(struct term *a,struct term *b){        //加法 struct term *ahead; struct term *bhead; struct term *aa; struct term *bb; ahead=a; bhead=b; aa=ahead->next;  bb=bhead->next; while(aa&&bb){ int result=cmp(aa->z,bb->z); switch(result){ case 2:ahead=aa;aa=aa->next;break;   //指数小 case 1: bhead->next=bb->next;ahead->next=bb;bb->next=aa;ahead=ahead- >next;bb=bhead->next;break; case 0: aa->x+=bb->x;  if(aa->x!=0)  {ahead=aa;}  else  {ahead->next=aa->next;free(aa);}  bhead->next=bb->next;free(bb);bb=bhead->next;aa=ahead- >next;break; } } if(bb) {while(bb) {bhead->next=bb->next;ahead->next=bb;ahead=bb;bb=bhead->next;} free(bhead);} if(aa) {while(aa) {ahead=aa;aa=aa->next;} } ahead->next=NULL; return a; } int cmp(int a,int b){ if(a==b) return 0; if(a>b) return 1; else  return 2; } struct term *creatlink(){              //创建多项式 struct term *p; struct term *head; struct term *q; p=(struct term *)malloc(sizeof(struct term)); p->z=-1; p->x=0; p->next=NULL; head=p; cout< int number0; cin>>number0; for(int i=1;i<=number0;i++){ q=(struct term *)malloc(sizeof(struct term)); cout<<"请输入第"< int n; float m; cin>>m>>n; q->x=m; q->z=n; p->next=q; p=q; } p->next=NULL; return head; }