Overloading operator < (lessthan) by using member function

Overloading operator  < (lessthan) by using member function:

If d1,d2 are objects of class ‘Distance’ then

//header files

class Distance

{

Private:

int feet;

float inches;

public:

Distance(int i, float f)

{

feet=i;

inches=f;

}

bool Distance::operator <(Distance); //prototype for overloading the < operator

};

bool Distance :: operator < (Distance d2)

{

if(feet < d2.feet)

return true;

else

return false;

}

void main()

{

Distance d1(4,5), d2(6,7);

if d1< d2;   // < operator is overloaded

cout<<”d1 is lesser than d2”;

if d2< d1;

cout<<”d2 is lesser than d1”;

}

Note: From the above class overloading of <= and >= can be easily learnt.

operator overloading

Over loading increement and decreement operators:

Over loading relational operators

friend function