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# Program to multiply 2 polynomial functions

Posted By: Easy Tutor     Category: C++ Programming     Views: 27190

## Code for Program to multiply 2 polynomial functions in C++ Programming

```//multiplication of poly

#include <iostream.h>
#include <iomanip.h>
#include <conio.h>

struct poly{
int coeff;
int pow;
poly *next;
};

class mul2poly
{
poly *poly1, *poly2, *poly3;
public:
mul2poly(){poly1=poly2=poly3=NULL;}
void mulpoly();
void display();
};

void mul2poly :: mulpoly(){
int i,p;
poly *newl=NULL,*end=NULL;
cout<<"Enter highest power for x\n";
cin>>p;
cout<<"\nFirst Polynomial\n";
for(i=p;i>=0;i--)
{
newl=new poly;
newl->pow=i;
cout<<"Enter Co-efficient for degree"<<i<<"::  ";
cin>>newl->coeff;
newl->next=NULL;
if(poly1==NULL)
poly1=newl;
else
end->next=newl;
end=newl;
}

cout<<"\n\nSecond Polynomial\n";
end=NULL;
for(i=p;i>=0;i--)
{
newl=new poly;
newl->pow=i;
cout<<"Enter Co-efficient for degree"<<i<<"::  ";
cin>>newl->coeff;
newl->next=NULL;
if(poly2==NULL)
poly2=newl;
else
end->next=newl;
end=newl;
}

//mul Logic
poly *p1=poly1,*p2=poly2;
int flag;
end=NULL;
while(p1 !=NULL){
p2=poly2;
while(p2!=NULL){
//if(p1->pow == p2->pow){
newl=new poly;
newl->pow=p1->pow + p2->pow;
newl->coeff=p1->coeff * p2->coeff;
newl->next=NULL;
if(poly3==NULL)
poly3=newl;
else{
flag=1;

//search if element already exist in poly3//flag will be zero if item already exist//1 otherwise
poly *tmp=poly3;
while(tmp!=NULL){
if(tmp->pow==newl->pow){
tmp->coeff += newl->coeff;
flag=0;
}
tmp=tmp->next;
}

//if item not present simply append it.if(flag==1)
end->next=newl;
}
end=newl;
p2=p2->next;
}
p1=p1->next;
}
}

void mul2poly :: display(){
poly *t=poly3;
while(t!=NULL){
cout.setf(ios::showpos);
cout<<t->coeff;
cout.unsetf(ios::showpos);
cout<<"X"<<t->pow;
t=t->next;
}
}

void main(){
clrscr();
mul2poly obj;
obj.mulpoly();
obj.display();
getch();
}```
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 Easy Tutor author of Program to multiply 2 polynomial functions is from United States. Easy Tutor says Hello Friends,I am Free Lance Tutor, who helped student in completing their homework. I have 4 Years of hands on experience on helping student in completing their homework. I also guide them in doing their final year projects.I have share many programs on this website for everyone to use freely, if you need further assistance, than please contact me on easytutor.2ya [at the rate] gmail [dot] comI have special discount scheme for providing tutor services. I am providing tutor service to students from various contries, currently most of my students are from United States, India, Australia, Pakistan, Germany, UK and Canada. I am also here to expand my technical network to receive more opportunity in my career, make friends to help them in resolving their technical problem, learn and share my knowledge, If you like to be my friend, Please send me friend request.Thanks,Happy Programming :) View All Articles

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