class operator c++ overload code example
Example 1: c++ overloaded == operator
#include <iostream>
#include <string>
class Car
{
private:
std::string m_make;
std::string m_model;
public:
Car(const std::string& make, const std::string& model)
: m_make{ make }, m_model{ model }
{
}
friend bool operator== (const Car &c1, const Car &c2);
friend bool operator!= (const Car &c1, const Car &c2);
};
bool operator== (const Car &c1, const Car &c2)
{
return (c1.m_make== c2.m_make &&
c1.m_model== c2.m_model);
}
bool operator!= (const Car &c1, const Car &c2)
{
return !(c1== c2);
}
int main()
{
Car corolla{ "Toyota", "Corolla" };
Car camry{ "Toyota", "Camry" };
if (corolla == camry)
std::cout << "a Corolla and Camry are the same.\n";
if (corolla != camry)
std::cout << "a Corolla and Camry are not the same.\n";
return 0;
}
Example 2: operator overloading in c++ <<
ostream &operator<<(ostream &output, const MyClass &myObject)
{
output << "P : " << myObject.property;
return output;
}