All Notes on BCA

#include<stdio.h>
#include<malloc.h>
#include<conio.h>
struct link{
       int coeff;
       int pow;
       struct link *next;
       };
struct link *poly1=NULL,*poly2=NULL,*poly=NULL;
void create(struct link *node)
{
 char ch;
 do
 {
//  clrscr();
  printf("\n Enter coeff : ");
  scanf("%d",&node->coeff);
  printf(" Enter power : ");
  scanf("%d",&node->pow);
  node->next=(struct link*)malloc(sizeof(struct link));
  node=node->next;
  node->next=NULL;
  printf("\n   Continue(y/n):");
  ch=getch();
 }
 while(ch=='y' || ch=='Y');
}
void show(struct link *node)
{
 while(node->next!=NULL)
 {
  printf("%dx^%d",node->coeff,node->pow);
  node=node->next;
  if(node->next!=NULL)
   printf(" + ");
 }
}
void polyadd(struct link *poly1,struct link *poly2,struct link *poly)
{
     while(poly1->next &&  poly2->next)
     {
      if(poly1->pow>poly2->pow)
      {
       poly->pow=poly1->pow;
       poly->coeff=poly1->coeff;
       poly1=poly1->next;
       }
      else if(poly1->powpow)
      {
       poly->pow=poly2->pow;
       poly->coeff=poly2->coeff;
       poly2=poly2->next;
       }
      else
      {
       poly->pow=poly1->pow;
       poly->coeff=poly1->coeff+poly2->coeff;
       poly1=poly1->next;
       poly2=poly2->next;
       }
      poly->next=(struct link *)malloc(sizeof(struct link));
      poly=poly->next;
      poly->next=NULL;
     }
     while(poly1->next || poly2->next)
     {
      if(poly1->next)
      {
       poly->pow=poly1->pow;
       poly->coeff=poly1->coeff;
       poly1=poly1->next;
       }
      if(poly2->next)
      {
       poly->pow=poly2->pow;
       poly->coeff=poly2->coeff;
       poly2=poly2->next;
       }
       poly->next=(struct link *)malloc(sizeof(struct link));
       poly=poly->next;
       poly->next=NULL;
       }
}
main()
{
      char ch;
      do{
      clrscr();
      poly1=(struct link *)malloc(sizeof(struct link));
      poly2=(struct link *)malloc(sizeof(struct link));
      poly=(struct link *)malloc(sizeof(struct link));
      printf("Enter 1st polinomial : ");
      create(poly1);
      clrscr();
      printf("Enter 2nd polinomial : ");
      create(poly2);
      clrscr();
      printf("1st polinomial : ");
      show(poly1);
      printf("\n2nd polinomial : ");
      show(poly2);
      polyadd(poly1,poly2,poly);
      printf("\n\n  Add of Two polynomial : ");
      show(poly);
      ch=getch();
      }
      while(ch=='y' || ch=='Y');
}

OUTPUT
Enter 1st polinomial : 
Enter coeff : 10
Enter Power : 7
  Continue(y/n): y
Enter coeff : 5
Enter Power : 4
  Continue(y/n): y
Enter coeff : 3
Enter Power : 2
  Continue(y/n): y
Enter coeff : 2
Enter Power : 0
  Continue(y/n): n

Enter 2nd polinomial : 
Enter coeff : 8
Enter Power : 6
  Continue(y/n): y
Enter coeff : 4
Enter Power : 4
  Continue(y/n): y
Enter coeff : 3
Enter Power : 3
  Continue(y/n): y
Enter coeff : 6
Enter Power : 0
  Continue(y/n): n

1st polinomial : 10x^7 + 5x^4 + 3x^3 + 2
2nd polinomial : 8x^6 + 4x^4 + 3x^2 + 6  
Add of two polimanial: 10x^7 + 8x^6 + 9x^4 + 3x^3 + 3x^2 + 8