4. Write a CPP program to add two polynomials of any degree using objects as function arguments.  (Hint: create two objects each represent one polynomial equation.)

// POLYNOMIAL ADDITION using OBJECTS AS FUNCTION ARGUMENTS


#include<iostream>
using namespace std;
 
class poly 
{
            int order;
            int coeff[10];
  public:
            void initialize();
            void getorder();
            void create();
            void poly3order(poly,poly);
            void polyadd(poly,poly);
            void display();
};
 
void poly::initialize()
{
            int i;
            for(i=0; i<10; i++)       coeff[i]=0;
}

void poly::getorder() 
{
            cout<<"Highest Order: ";
            cin>>order;
}
 
void poly::create()
{
            int i;
            for(i=order; i>-1; i--)
            {
                        cout<<"Exponent: "<<i<<" ";
                        cout<<"Coefficient: ";
                        cin>>coeff[i];
            }
}
void poly::poly3order(poly f, poly s)
{          
            if(f.order==s.order)                            
            order=f.order;
            else
                        if(f.order>s.order) 
                        order=f.order;
                        else  if(s.order>f.order)          
                        order=s.order;
}

void poly::polyadd(poly fp, poly sp)
{
            int i;
            for(i=order; i>-1; i--)
                        coeff[i]=fp.coeff[i]+sp.coeff[i];
}
 
void poly::display() 
{
            int i;
            for(i=order; i>-1; i--)
            {
                        if(i==order)
                                    cout<<coeff[i]<<"x^"<<i<<" ";
                        else
                        { 
                                   if(coeff[i]>=0) cout<<"+";
 
                                   cout<<coeff[i]<<"x^"<<i<<" ";
                        }
            } 
            cout<<endl;
}

int main()
{
            poly p1,p2,p3;
            cout<<"Polynomial 1:\n";
            p1.initialize();             
            p1.getorder();
            p1.create();
            cout<<"Polynomial 2:\n";
            p2.initialize();
            p2.getorder();
            p2.create();
            p3.initialize();
            p3.poly3order(p1,p2);
            p3.polyadd(p1,p2);
            cout<<"First Polynomial: "; 
            p1.display();
            cout<<"Second Polynomial: ";
            p2.display();
            cout<<"Third Polynomial: ";                                       
            p3.display();
            return 0;
}
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