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poly3.cpp
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poly3.cpp
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#include<stdio.h>
#include<stdlib.h>
struct node
{
float coef;
int expo;
struct node *link;
};
struct node *create(struct node *);
struct node *insert_s(struct node *,float,int);
struct node *insert(struct node *,float,int);
void display(struct node *ptr);
void poly_add(struct node *,struct node *);
void poly_mult(struct node *,struct node *);
main( )
{
struct node *start1=NULL,*start2=NULL;
printf("Enter polynomial 1 :\n");
start1=create(start1);
printf("Enter polynomial 2 :\n");
start2=create(start2);
printf("Polynomial 1 is : ");
display(start1);
printf("Polynomial 2 is : ");
display(start2);
poly_mult(start1, start2);
}
struct node *create(struct node *start)
{
int i,n,ex;
float co;
printf("Enter the number of terms : ");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
printf("Enter coeficient for term %d : ",i);
scanf("%f",&co);
printf("Enter exponent for term %d : ",i);
scanf("%d",&ex);
start=insert_s(start,co,ex);
}
return start;
}
struct node *insert_s(struct node *start,float co,int ex)
{
struct node *ptr,*tmp;
tmp=(struct node *)malloc(sizeof(struct node));
tmp->coef=co;
tmp->expo=ex;
if(start==NULL || ex > start->expo)
{
tmp->link=start;
start=tmp;
}
else
{
ptr=start;
while(ptr->link!=NULL && ptr->link->expo >= ex)
ptr=ptr->link;
tmp->link=ptr->link;
ptr->link=tmp;
}
return start;
}
struct node *insert(struct node *start,float co,int ex)
{
struct node *ptr,*tmp;
tmp=(struct node *)malloc(sizeof(struct node));
tmp->coef=co;
tmp->expo=ex;
if(start==NULL)
{
tmp->link=start;
start=tmp;
}
else
{
ptr=start;
while(ptr->link!=NULL)
ptr=ptr->link;
tmp->link=ptr->link;
ptr->link=tmp;
}
return start;
}
void display(struct node *ptr)
{
if(ptr==NULL)
{
printf("Zero polynomial\n");
return;
}
while(ptr!=NULL)
{
printf("(%.1fx^%d)", ptr->coef,ptr->expo);
ptr=ptr->link;
if(ptr!=NULL)
printf(" + ");
else
printf("\n");
}
}
void poly_mult(struct node *p1, struct node *p2)
{
struct node *start3;
struct node *p2_beg = p2;
start3=NULL;
if(p1==NULL || p2==NULL)
{
printf("Multiplied polynomial is zero polynomial\n");
return;
}
while(p1!=NULL)
{
p2=p2_beg;
while(p2!=NULL)
{
start3=insert_s(start3,p1->coef*p2->coef,p1->expo+p2->expo);
p2=p2->link;
}
p1=p1->link;
}
printf("Multiplied polynomial is : ");
display(start3);
}