FUNCTION OVERLOADING - Program to create a class called complex

Write a C++ program to create a class called COMPLEX and implement the following overloading functions ADD that return a COMPLEX number .

I. ADD(a,s2) - where a is an integer(real part) and s2 is a complex    number.

II. ADD(s1,s2) - where s1 and s2 are complex objects.

#include<iostream.h>
#include<conio.h>
class complex
{
  int r,i;
  public:
  void read();
  void print();
  friend complex add(int a,complex c);
  friend complex add(complex c1,complex c2);
};
void complex::read()
{
  cout<<"Enter real and imaginary\n";
  cin>>r>>i;
}
void complex::print()
{
  cout<<r<<"+i"<<i<<endl;
}
complex add(int a,complex c)
{
  complex t;
  t.r=a+c.r;
  t.i=c.i;
  return t;
}
complex add(complex c1,complex c2)
{
  complex t;
  t.r=c1.r+c2.r;
  t.i=c1.i+c2.i;
  return t;

}
void main()
{
   int a=2;
   clrscr();
   complex s1,s2,s3;
   s1.read();
   cout<<"\ns1 : ";
   s1.print();
   s2=add(a,s1);
   cout<<"s2 : 2+s1\n";
   cout<<"   : ";
   s2.print();
   s3=add(s1,s2);
   cout<<"s3=s1+s2\n";
   cout<<"s1 : ";
   s1.print();
   cout<<"s2 : ";
   s2.print();
   cout<<"s3 : ";
   s3.print();
   getch();
}

output