Praktikum ke 3

 INHERITANCE dalam C++

BILANGAN.H

class Bilangan{

      friend ostream& operator<<(ostream&, const Bilangan&);

      friend istream& operator>>(istream&, Bilangan&);

public:

             Bilangan(int a0=0, float b0=0.0): a(a0), b(b0){}

             void banding_int(const Bilangan&, const Bilangan&);

             Bilangan& operator=(const Bilangan&);

             Bilangan operator+(const Bilanagan&) const;

             Bilangan operator-()const;

            

protected:

             int a;

             float b;

};

                 

 ostream& operator<<(ostream& out, const Bilangan& x)

 {

          out << "Bagian integer:" << x.a <<endl;

          out << "Bagian float:" << x.b <<endl;

          return out;

          }

              

void Bilangan::banding_int(const Bilangan& x, const Bilangan& y)

{

     if(x.a >y.a) cout <<x.a<<"::x lebih besar dari " <<y.a<<"::y";

     else cout <<x.a<<":: x lebih kecil dari "<<y.a<<"::y";

}

Bilangan& bilangan::operator=(const Bilangan& x)

{

          a=x.a;

          b=x.b;

          return *this;

          }

istream& operator >>(istream& in,Bilangan& x)

{

         cout<<"\nMasukan bagian integer:";

         in>> x.a;

         cout<<"Masukkan bagian float:";

         in >> x.b;

         return in;

         }

Bilangan::Bilangan::operator+(const Bilangan& x) const

{ Bilangan cc;

cc.a= a + x.a;

cc.b= b + x.b;

return cc;

}

Bilangan Bilangan::operator-() const

{ Bilangan x;

x.a=-a;

x.b=-b;

return x;

}

BILCHAR.H

#include"bilangan.h"

class Bil_char : public Bilangan{

      friend ostream& operator<<(ostream&, const Bil_char&);

      public:

             Bil_char(int a0=0,int b0=0, char ch='x')

             :Bilangan(a0,b0),c(ch){}

             private:

                     char c;

                     };

                     ostream& operator<<(ostream& out, const Bil_char& x)

                     {

                              out<<"Bagian integer:" << x.a <<endl;

                              out<<"Bagian float:" << x.b <<endl;

                              out<<"Bagian char:" << x.c <<endl;

                              return out;

                              }

Turunan.cpp

#include<iostream.h>

#include "bilchar.h"

void main(){

     Bilangan s, t(-2,3.14), d;

     cout <<"Nilai awal s\n" << s; // operator biner << output

     cout << "Nilai awal t dari deklarasi\n"<< t;

     s=t;

     cout << "setelah s di-assign t\n";

     cout << "Masukan nilai nilai objeck d";

     cin >> d;

     cout <<"Setelah d + t => \n" << d+t;

     cout << "Nilai d dinegatifkan\n" << -d;

     Bil_char ss;

     cout << "Nilai awal ss\n" << ss;

     }