实验报告封皮

PNode *pa=ha->next,*pb=hb->next,*pc,*hc,*q;

int exp;

float coef;

hc=(PNode *)malloc(sizeof(PNode));

hc->exp=-1;

hc->next=hc;

pc=hc;

while (pa->exp!=-1 || pb->exp!=-1) {

if (pa->exp>pb->exp) {

exp=pa->exp;

coef=pa->coef;

pa=pa->next;

}

else if (pa->exp<pb->exp) {

exp=pb->exp;

coef=pb->coef;

pb=pb->next;

}

else {

exp=pa->exp;

coef=pa->coef+pb->coef;

pa=pa->next;

pb=pb->next;

}

if (coef!=0) {

q=(PNode *)malloc(sizeof(PNode));

q->exp=exp;

q->coef=coef;

q->next=pc->next;

pc->next=q;

pc=q;

}

}

return hc;

}

PNode * PolySubtract(PNode *ha,PNode *hb)

{

//编写此算法，实现两多项式（头指针分别为ha和hb）相减，返回差多项式hc=ha-hb。

PNode *hc=NULL;