Overloading

When we first introduced constructors we gave sample code with a few constructors with different arguments...

energyBill();
energyBill(double, double, int, string, int);
energyBill(const energyBill &);

This is an example of function overloading. Functions are overloaded when they have the

same name but different argument lists. The parameters given to a function determine which one to use.

Function Overloading

Function overloading isn’t just for constructors...

int getMax( int x, int y );
char getMax( char first, char second );
double getMax( double red, double blue );
string getMax( string first, string second );
int mxNum = getMax(19, 4);
// calls int getMax(int, int );

char mxChar = getMax('A', 'V'); // calls char getMax(char, char);

The definitions/logic of the functions are supposed to be different.

• If they were identical, it may be easier to use function templates instead. Later ...