Polynomial multiplication using linked list in c

polynomial addition using linked list in c
matrix multiplication using linked list in c
polynomial representation using generalized linked list
create polynomial using linked list
c program to implement polynomial using arrays
evaluation of polynomial using linked list
addition of two polynomials using circular linked list in c
polynomial addition using linked list in java

Iam working on a program to perform addition,subtraction,multiplication and differentiation operations on a polynomial using linked list in c. The other operations are working fine except multiplication one. here is the code

#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
 {
  printf("\n\nenter coeff:");
  scanf("%d",&node->coeff);
  printf("\nenter power:");
  scanf("%d",&node->pow);
  node->next=(struct link*)malloc(sizeof(struct link));
  node=node->next;
  node->next=NULL;
printf("\ncontinue(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->pow<poly2->pow)
  {
   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;
   }

}

void polysub(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->pow<poly2->pow)
  {
   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;
   }

}

void polymul(struct link *n1, struct link *n2, struct link *n)
{
    struct link * n2beg=n2;

            while (n1) 
            {
                    struct link * temp=(struct link *)malloc(sizeof(struct link));
                    temp->next=NULL;    
                    n2=n2beg;
                    while (n2) 
                    {
                            temp->coeff = n1->coeff * n2->coeff;

                            temp->pow = n1->pow + n2->pow;

                            n2 = n2->next;
                            temp->next=(struct link *)malloc(sizeof(struct link));
                            temp=temp->next;
                            temp->next=NULL;

                    }

                    polyadd(temp,n,n);
                    n1 = n1->next;
                    free(temp);
            }

}

void diff(struct link* p1,struct link* p2)
{

while(p1->next!=NULL)
{
    p2->coeff=p1->coeff*p1->pow;
    p2->pow=p1->pow-1;
    p2->next=NULL;
    p2->next=(struct link *)malloc(sizeof(struct link));
   p2=p2->next;
   p2->next=NULL;
   p1=p1->next;
}

}
  main()
  {
  int op;
  char ch;
  do{
  poly1=(struct link *)malloc(sizeof(struct link));
  poly2=(struct link *)malloc(sizeof(struct link));
  poly=(struct link *)malloc(sizeof(struct link));
  printf("\n\nWhat do you want to do?\n1.Addition\n2.Subtraction
          \n3.Multiplication\n4.Differentiation\n0.Exit
          \nEnter your choice:");
  scanf("%d",&op);
  switch(op)
  {
        case 1:
            printf("\n\nenter 1st polynomial:");
            create(poly1);
            printf("\n\nenter 2nd polynomial:");
            create(poly2);
            printf("\n1st Polynomial:\t");
            show(poly1);
            printf("\n2nd Polynomial:\t");
            show(poly2);
            polyadd(poly1,poly2,poly);
            printf("\nAdded polynomial:\t");
            show(poly);
            break;
        case 2:
            printf("\n\nenter 1st polynomial:\t");
            create(poly1);
            printf("\n\nenter 2nd polynomial:\t");
            create(poly2);
            printf("\n\n1st Polynomial:\t");
            show(poly1);
            printf("\n\n2nd Polynomial:\t");
            show(poly2);
            polysub(poly1,poly2,poly);
            printf("\n\nSubtracted polynomial:\t");
            show(poly);
            break;  
        case 3:
            printf("\n\nenter 1st polynomial:");
            create(poly1);
            printf("\n\nenter 2nd polynomial:");
            create(poly2);
            printf("\n\n1st Polynomial:\t");
            show(poly1);
            printf("\n\n2nd Polynomial:\t");
            show(poly2);
            polymul(poly1,poly2,poly);
            printf("\n\nMultiplied polynomial:\t");
            show(poly);
            break;
        case 4:
            printf("\n\nenter polynomial:");
            create(poly1);
            printf("\n\nPolynomial:\t");
            show(poly1);
            diff(poly1,poly2);
            printf("\n\nDifferentiated Polynomial:\t");
            show(poly2);
            break;
        }

 /* printf("\n Want to continue? Y/N:");
  ch=getch();*/
  }
  while(op);

}

polyadd(temp,n,n) as used in polymul() has trouble coping with using n as a source polynomial and as the sum destination polynomial.

Either re-work polyadd() to cope with parameters that point to the same polynomial or re-work the call of polyadd() in polymul() to use distinct polynomials. Suggest the first.

Multiplication of two polynomials using Linked list, polyadd(temp,n,n) as used in polymul() has trouble coping with using n as a source polynomial and as the sum destination polynomial. 1. Iam working on a program to perform addition,subtraction,multiplication and differentiation operations on a polynomial using linked list in c. The other operations are working fine except multiplication one. here is the code. #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 { printf (" enter coeff:"); scanf

I did not go through your full code, as I found an error in your create() function. Note that you have passed poly1 to the function create() as argument.

This not correct as C follows call by value. What happens is only the value of poly1 (which is still un-initialised) is passed and *node stores that value. It's better to pass the address of poly1 as argument and catch that value in the function using pointer to pointer.

Polynomial multiplication using linked list in c, Implementation: Polynomials are implemented using single linked lists each node having a coefficient and an exponent part. Pointer is set to… Polynomial Multiplication using Linked List in C Posted on February 9, 2015by subarnopal Following simple algebraic rules we perform the Polynomial multiplication of two polynomials standard forms ax^n+bx^n-1+… where we take two polynomials as input from the user one node after another and later perform the multiplication.

#include<stdio.h>
#include <conio.h>
struct node
{
    int c,e;
    struct node *link;
}*start1=NULL,*start2=NULL,*start3=NULL,*temp1,*temp2,*temp3,*new_node;
int delete_dup(int h)
{
    struct node *cr,*prev,*run,*tmp;

    cr = start3->link;
    prev = start3;

    while(cr != NULL){

        run = start3;

        while(run != cr)
        {
             if(run->e == cr->e)
            {
                run->c+=cr->c;
                tmp = cr;
                cr = cr->link;
                prev->link = cr;
                remove(tmp);h--;
                break;
            }

            run = run->link;
        }

        if(run == cr){
            cr = cr->link;
            prev = prev->link;
        }
    }
    return h;

}

void main()
{
    int n,m,i,j,k;
    puts("Enter the number of terms in first polynomial");
    scanf("%d",&n);
    for(i=0;i<n;i++)
    {
        new_node=(struct node*)malloc(sizeof(struct node));
        new_node->link=NULL;
        puts("C=");
        scanf("%d",&new_node->c);
        puts("E=");
        scanf("%d",&new_node->e);
        new_node->link=start1;
        start1=new_node;

        }
        puts("Enter the number of terms in first polynomial");
    scanf("%d",&m);
    for(i=0;i<m;i++)
    {
        new_node=(struct node*)malloc(sizeof(struct node));
        new_node->link=NULL;
        puts("C=");
        scanf("%d",&new_node->c);
        puts("E=");
        scanf("%d",&new_node->e);
        new_node->link=start2;
        start2=new_node;

        }
        temp1=start1;
        temp2=start2;
        i=0; j=0;
        while(i<m)
        {   
            j=0; temp1=start1;
            while(j<n)
            {
                new_node=(struct node*)malloc(sizeof(struct node));
                new_node->link=NULL;
                new_node->c=temp1->c*temp2->c;
                new_node->e=temp1->e+temp2->e;
                new_node->link=start3;
                start3=new_node;
                j++;
                temp1=temp1->link;
            }
            temp2=temp2->link;
            i++;
        }
        i=0;
        k=delete_dup(m*n);
        temp3=start3;
        while(i<k-1)

            {
                printf("(%dx^%d)+",temp3->c,temp3->e);
                temp3=temp3->link;
                i++;
            }
                printf("(%dx^%d)",temp3->c,temp3->e);

                    }

Polynomial Multiplication using Linked List in C, Scheme, APL, Lua, Python 2.7, Ruby, Roy, Python, Nodejs, Deno (beta), Go, C++, C, C#, F#, HTML C – Polynomial Multiplication using Singly Linked List. C​  10 thoughts on “ C Program for Addition and Multiplication of Polynomial Using Arrays or Linked List ” Jayasooryan Kv October 12, 2014. Code working! Thanks. Better if code is aligned.

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
struct node{
    int coef,pow;
    struct node *next;
};

struct node* create()
{
    int c;
    struct node *new_node=NULL;
    struct node *head=NULL,*temp;



    do{
        new_node=(struct node*)malloc(sizeof(struct node));
        printf("\nEnter coef :");
        scanf("%d",&new_node->coef);
        printf("\nEnter power : ");
        scanf("%d",&new_node->pow);

        if(head==NULL)
        {
            head=new_node;
            head->next=NULL;
            temp=new_node;
        }
        else
        {
            temp->next=new_node;
            temp=temp->next;
            temp->next=NULL;
        }
        printf("\nDo you want to continue :");
        scanf("%d",&c);
    }while(c==1);
    return head;
}

void print(struct node *p)
{
    while(p!=NULL)
    {
        printf("|%d|%d|->",p->coef,p->pow);
        p=p->next;
    }
}

struct node* create_new(int p, int q)
{

    struct node *nn=(struct node*)malloc(sizeof(struct node));
    nn->coef=p;
    nn->pow=q;
    nn->next=NULL;
    return nn;
}
struct node* add(struct node *poly1,struct node *poly2)
{
    struct node *tempadd,*temp;
    struct node *temp1=poly1;
    struct node *temp2=poly2,*head=NULL;
    while(temp1!=NULL && temp2!=NULL)
    {   
        if(temp1->pow==temp2->pow)
        {
            tempadd=create_new(temp1->coef+temp2->coef,temp2->pow);
            temp1=temp1->next;
            temp2=temp2->next;
        }
        else if(temp1->pow<temp2->pow)
        {
            tempadd=create_new(temp2->coef,temp2->pow);
            temp2=temp2->next;
        }
        else
        {
            tempadd=create_new(temp1->coef,temp1->pow);
            temp1=temp1->next;
        }
        if(head==NULL)
        {
            head=tempadd;
            temp=head;
        }
        else
        {
            temp->next=tempadd;
            temp=temp->next;
        }

    }
    if(temp1!=NULL)
    {
        while(temp1!=NULL)
        {
            tempadd=create_new(temp1->coef,temp1->pow);
            temp1=temp1->next;
            temp->next=tempadd;
            temp=temp->next;
        }
    }
    else if(temp2!=NULL)
    {
        while(temp2!=NULL)
        {
            tempadd=create_new(temp2->coef,temp2->pow);
            temp2=temp2->next;
            temp->next=tempadd;
            temp=temp->next;
        }
    }

    return head;
}

void main()
{
    struct node *head1,*head2,*head3;
    head1=create();
    print(head1);
    head2=create();
    print(head1);
    printf("\n");
    print(head2);
    printf("\n");
    head3=add(head1,head2);
    printf("\n\nResult : ");
    print(head3);
    getch();
}

C – Polynomial Multiplication using Singly Linked List, polynomial addition using linked list in c,program for polynomial addition using linked list in data structure in c,addition of two polynomials using  Make a polynomial abstract datatype using struct which basically implements a linked list. We write different functions for Creating (ie, adding more nodes to the linked list) a polynomial function, Adding two polynomials and Showing a polynomial expression.

#include<stdio.h>
#include<stdlib.h>
#include<malloc.h>
typedef struct node {
    struct node *previous;
    int coef;
    int pow;
    struct node *next;
}poly;
poly *locate(int,poly *);
void display(poly *);
poly *mult(poly *,poly *,poly *);
void display2(poly *);
void main()
{
char ch;
poly *s1,*s2,*s3,*head1,*head2,*head3,*s4;;
s1=(poly *)malloc(sizeof(poly));
s1->previous=NULL;
head1=s1;
s2=(poly *)malloc(sizeof(poly));
s2->previous=NULL;
head2=s2;
head3=s3;
printf("Enter first polynomial :\n");
do{                                           //Input for polynomial-1
    printf("Enter co-efficient : ");
    scanf("%d",&s1->coef);
    printf("Enter exponent : ");
    scanf("%d",&s1->pow);
    printf("Do you want to enter more terms(Y/N) : ");
    scanf(" %c",&ch);
    if(ch=='Y'){
        s1->next=(poly*)malloc(sizeof(poly));
        s1->next->previous=s1;
        s1=s1->next;
    }
    else {
        s1->next=NULL;
        break;
    }
}while(1);
printf("Enter second polynomial : \n");
do{                                     //input for polynomial-2
    printf("Enter co-efficient : ");
    scanf("%d",&s2->coef);
    printf("Enter exponent : ");
    scanf("%d",&s2->pow);
    printf("Do you want to enter more terms(Y/N) : ");
    scanf(" %c",&ch);
    if(ch=='Y'){
        s2->next=(poly*)malloc(sizeof(poly));
        s2->next->previous=s2;
        s2=s2->next;
    }
    else {
        s2->next=NULL;
        break;
    }
}while(1);
printf("Entered polynomials are : \n");
display(s1);
printf("\n");
display(s2);
s3=NULL;
s4=mult(s1,s2,s3);
printf("Resultant Polynomial after multiplication :\n");
display(s4);
}
void display(poly *a)
{
while(a!=NULL)
{
    printf("%dx^%d",a->coef,a->pow);
    if(a->previous!=NULL)
        printf(" + ");
    a=a->previous;
}
}
poly *mult(poly *s1,poly *s2,poly *s3)
{
while(s1->previous!=NULL)
    s1=s1->previous;
while(s2->previous!=NULL)
    s2=s2->previous;
while(s1)
{
    while(s2->previous!=NULL)
        s2=s2->previous;
    while(1)
    {
        if(s2->next!=NULL)
        {   
            poly *s4;
            if(s3==NULL)
            {
                s3=(poly *)malloc(sizeof(poly));
                s3->pow=s1->pow+s2->pow;
                s3->coef=s1->coef*s2->coef;
                s3->previous==NULL;
                s3->next==NULL;
            }
            else
            {
                s4=locate(s1->pow+s2->pow,s3);
                if(s4==NULL)
                {
                    s3->next=(poly *)malloc(sizeof(poly));
                    s3->next->previous=s3;
                    s3=s3->next;
                    s3->pow=s1->pow+s2->pow;
                    s3->coef=s1->coef*s2->coef;
                    s3->next==NULL;
                }
                else
                {
                    s4->coef=(s4->coef)+(s1->coef*s2->coef);    
                }
            }
            s2=s2->next;
        }
        else
        {
            poly *s4;
            if(s3==NULL)
            {
                s3=(poly *)malloc(sizeof(poly));
                s3->pow=s1->pow+s2->pow;
                s3->coef=s1->coef*s2->coef;
                s3->previous==NULL;
                s3->next==NULL;
            }
            else{
                s4=locate(s1->pow+s2->pow,s3);
                if(s4==NULL)
                {
                    s3->next=(poly *)malloc(sizeof(poly));
                    s3->next->previous=s3;
                    s3=s3->next;
                    s3->pow=s1->pow+s2->pow;
                    s3->coef=s1->coef*s2->coef;
                    s3->next==NULL;
                }
                else
                {
                    s4->coef=s4->coef+s1->coef*s2->coef;
                }
            }
            break;
        };
    }s1=s1->next;
}return s3;

}
poly *locate(int exp,poly *s3)
{
if(s3==NULL)
{
    return NULL;
}
else if(s3->pow==exp)
{
    return s3;
}
else{
    return locate(exp,s3->previous);
}
}

I considered the first term of first polynomial and multiplied with all the terms of second polynomial thereby creating a primary linked list of multiplied polynomial. As next piece of code I considered next term of first polynomial and then multiplied and searched in the multiplied polynomial for the same index and added the result to it, If it is not present I created a new node in the multiplied polynomial. Happy Coding

Polynomial addition and multiplication using linked list, Multiplying two polynomials using linked list. poly.c. #include<stdio.h>. #include<​stdlib.h>. struct node. {. int coefficient,exponent;. struct node *next;. };. polynomial addition using linked list in c,program for polynomial addition using linked list in data structure in c,addition of two polynomials using circular linked list in c,polynomial subtraction using linked list,polynomial addition and subtraction using linked list in c,polynomial division using linked list in c,

Multiplying two polynomials using linked list · GitHub, C Program for Addition and Multiplication of Polynomial Using Arrays or Linked List. Polynomial addition, multiplication (8th degree polynomials) using arrays. #​  Polynomial Multiplication Using Linked List A polynomial expression can be represent as linked list. 4X^4 + 3x^2 + 7X is a polynomial expression and its linked list representation is as follows.

C Program for Addition and Multiplication of Polynomial Using , First column in the input file represents co-efficient and the second column represents exponent. Output: (C Program Multiply Two Polynomial  Output: (Polynomial Addition Using Linked List Example (in C)) 6 5 7 4 8 2 7 5 3 4 5 3 6X^5 + 7X^4 + 8X^2 // Polynomial expression - input 1 7X^5 + 3X^4 + 5X^3 // Polynomial expression - input 2 13X^5 + 10X^4 + 5X^3 + 8X^2 // Output

Polynomial Multiplication Using Linked List, C++ Program to Multiply two polynomials using linked list. cin>>c; } return; } void polynomial::show() // Show Polynomial { struct node *ptr; ptr=start; while(ptr​!= I have written a program to multiply two polynomials in the form of single linked lists. I am unable to print output using this code. The output I am getting is 1st Number: 5x^2 + 4x^1 + 2x^0 2nd

Comments
  • (What did "Community" change in this post?) Instead of implementing polysub() in addition to polyadd(), do a polyscale() for scalar multiplication. (In polyadd() it is possible to code copy "unpaired" node to result once - from eight times over as presented.)
  • Please add some explanation as well. :)
  • While this code snippet might provide some limited, immediate help, a proper explanation would greatly improve its long-term value by showing why this is a good solution to the problem and would make it more useful to future readers with other, similar questions. Please edit your answer to add some explanation, including the assumptions you’ve made.