write a program subtracting two polynomials using linked list

Question

#include<stdio.h>
#include<conio.h>
struct node
{
int coeff, power;
struct node *next;
};
struct node *sub_poly(struct node *start1,struct node *start2,struct node *start3)
{
struct node *ptr1, *ptr2;
int coeff, power;
ptr1 = start1;
ptr2 = start2;

while(ptr1 != NULL && ptr2 != NULL)
{

if(ptr1 -> power == ptr2 -> power)
{
coeff = ptr1 -> coeff - ptr2 -> coeff;
start3 = add_node(start3, coeff, ptr1 -> power)
ptr1 = ptr1 -> next;
ptr2 = ptr2 -> next;
}
else if(ptr1 -> power > ptr2 -> power)
{
start3 = add_node(start3, ptr1 -> coeff, ptr1 -> power)
ptr1 = ptr1 -> next;
}
else if(ptr1 -> power < ptr2 -> power)
{
start3 = add_node(start3, -ptr2 -> coeff, ptr2 -> power)
ptr2 = ptr2 -> next;
}
}
if(ptr1 == NULL)
{
while(ptr2 != NULL)
{
start3 = add_node(start3, -ptr2

Answer 1

ASWIN H

https://www.sololearn.com/Discuss/2436770/?ref=app