Complex number addition cpp program

#include<iostream.h>

#include<conio.h>

#include<stdlib.h>

class complex

{ private:

          double real,image;

  public:

          complex();

          complex(double,double);

          void getcomplex();

          void dispcomplex();

          friend complex addcomplex(complex,complex);

};

complex::complex()

{        real=0.0;

          image=0.0;

}

complex::complex(double x,double y)

{        real=x;

          image=y;

}

void complex::getcomplex()

{        cout<<" Real Part : ";

          cin>>real;

          cout<<" Imaginary Part : ";

          cin>>image;

}

void complex::dispcomplex()

{        cout<<" ("<<real<<" + "<<image<<" i)";

}

complex addcomplex(complex x,complex y)

{        complex temp;

           temp.real=x.real+y.real;

          temp.image=x.image+y.image;

          return temp;

}

void main()

{        int c;

          complex c1,c2,c3;

          while(1)

          {        clrscr();

cout<<" Perform the following operations on Complex Numbers .\n ";

                   cout<<" -----------------------------------------------------\n ";

                   cout<<" 1.Enter two complex numbers.\n ";

                   cout<<" 2.Display the complex numbers.\n ";

                   cout<<" 3.Add complex numbers.\n ";

                   cout<<" 4.Exit from program.\n ";

                   do

                   {        cout<<" Select your choice(1:4) : \n";

                             cin>>c;

                   }

                   while((c<0)||(c>4));

          clrscr();

          switch(c)

          { case 1 :

cout<<" Enter the first complex number\n";

                    c1.getcomplex();

                    cout<<" Enter the second complex number\n";

                    c2.getcomplex();

                 break;

      case 2 :

cout<<" Complex numbers you entered are \n";

                    c1.dispcomplex();

                    cout<<" and ";

                    c2.dispcomplex();

                    break;

      case 3 :

cout<<" Sum of ";

                    c1.dispcomplex();

                    cout<<" and ";

                    c2.dispcomplex();

                    cout<<" is ";

                    c3=addcomplex(c1,c2);

                    c3.dispcomplex();

                    break;

          case 4 :

exit(1);break;

          }

          cout<<endl<<" Press any key to continue....";

          getch();

     }

}