这段程序什么意思啊!C.求大神指导!while(pa&&pb) { CreateItem(s); i=ItemComp(*pa,*pb); if(i==0){ s->coef=pa->coef+pb->coef; s->expn=pa->expn; if(s->coef){last->next=s;s->next=NULL;last=s;} pa=pa->next; pb=pb->next;
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