안녕하세요 만해입니다.

헐헐~

넘 오래된거라서요

잘 기억이 안나는데요

우선 에러만 잡아 봤습니다.

//---------------------------------------------------------------------------
#include <stdio.h>
#include <alloc.h>
typedef struct polyNode *polyPtr;
typedef struct{
    int coef;
    int exp;
    polyPtr link;
}polyNode;
polyPtr d,a,b;
//---------------------------------------------------------------------------
polyNode* padd(polyNode* a, polyNode* b);
void attach(int coeff, int expo, polyNode *ptr);
int compare(int a , int b);
//---------------------------------------------------------------------------
int compare(int a, int b)
{
  if ( a > b )
    return 1;
  else if ( a== b )
    return 0;
  else
    return -1;
}
//---------------------------------------------------------------------------
void main()
{
  polyNode* Root;
  polyNode a,b,c;
  a.coef = 2;
  a.exp = 1;
  b.coef = 2;
  b.coef = 2;
  a.link = &b;
  b.link = &c;
  c.link = NULL;
  attach(2, 3, &c);
  Root->link = a.link ;
  Root = padd(&a,&b);

  for ( ; Root ; Root = Root->link )
    printf("%d %d",Root->coef,Root->exp);
}
//---------------------------------------------------------------------------
polyNode* padd(polyNode* a, polyNode* b)
{
    polyNode* temp;
    polyNode* temp1;
    polyNode* temp2;
    int sum;
    temp2 = (polyNode*)malloc(sizeof(polyNode));
    //if (IS_FULL(temp2)) return;
    temp1 = temp2;

    while (a && b)
    switch (compare(a->exp , b->exp))
    {
        case -1 :
                attach(b->coef, b->exp, &temp2);
                b = b->link;
                break;
        case   0 :
                sum = a->coef + b->coef;
                if(sum)
                    attach(sum, a->exp, &temp2);
                a = a->link;
                b = b->link;
                break;
        case   1 :
                  attach(a->coef, a->exp, &temp2);
                  a = a->link;
                  break;
    }
    for (;a;a = a->link) attach(a->coef, a->exp, &temp2);
    for (;b;b = b->link) attach(b->coef, b->exp, &temp2);
    temp2->link = NULL;
    temp = temp1;
    temp1 = temp1->link;
    free(temp);
    return temp1;
}
//---------------------------------------------------------------------------
void attach(int coeff, int expo, polyNode *ptr)
{
    polyNode* temp;
    temp = (polyPtr)malloc(sizeof(polyNode));
//    if (IS_FULL(temp)) return;
    temp->coef = coeff;
    temp->exp = expo;
    ptr->link = temp;
    ptr = temp;
}
//---------------------------------------------------------------------------

그런데 별 도움은 안될것 같네요 그럼 이만~

참 compare() 함수하고

IS_FULL() 함수는 아마 기존에 존재 하지 않은

프로그램 내의 정의되어 있는 사항 같네요