Overload relational operator in C ++

There are many different relational operators supported by C ++, for example: (<,>, <=,> =, ==, .) that can be used to compare data types with available in C ++.

You can overload any relational operator, which can be used to compare objects of a class.

The following example explains how the

 #include using namespace std ; class KhoangCach { private : int met ; int centimet ; public : // phan khai bao cac constructor can thiet KhoangCach (){ met = 0 ; centimet = 0 ; } KhoangCach ( int m , int c ){ met = m ; centimet = c ; } // nap chong toan tu < bool operator <( const KhoangCach & k ) { if ( met < k . met ) { return true ; } if ( met == k . met && centimet < k . centimet ) { return true ; } return false ; } }; int main () { KhoangCach K1 ( 23 , 15 ), K2 ( 17 , 46 ); if ( K1 < K2 ) { cout << "K1 la ngan hon K2 " << endl ; } else { cout << "K2 la ngan hon K1 " << endl ; } return 0 ; } 

Compiling and running the above C ++ program will produce the following results:

 K2 la ngan hon K1 

According to Tutorialspoint

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