operators - operator overloading

at this time I will discuss the use of operators - operator overloading.

Overloading is the use of multiple methods or properties of the same name, but has a list of parameters / arguments are different. The difference in question is a different number of parameters, different data types, or different from both (the number of parameters and data types). Methods or properties are just different return value (return value) can not be said to be overloading.












#include <cstdlib>
#include <iostream>

using namespace std;

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 Bilangan&) const;
Bilangan operator-()const;
private:
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 <<”\nMasukkan 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;
}

int main(int argc, char *argv[])
{
Bilangan s, t(-2,3.14), d;
cout << “Nilai awal s\n” << s;
cout << “Nilai awal t dari deklarasi\n” << t;
s = t;
cout << “Setelah s di-assign t\n”;
cout << “Nilai s\n” << s;
cout << “Masukkan nilai-nilai objek d”;
cin >> d;
cout << “Setelah d + t => \n” << d+t;
cout << “Nilai d dinegatifkan\n” << -d;

system(“PAUSE”);
return EXIT_SUCCESS;
}