A convenient shorthand notation for a default value

#ifndef SOMECLASS_H

#define SOMECLASS_H

class SomeClass {

public:

virtual void Function(const float x, const float y =0.);

};

#endif

This means:

“if this parameter is not given, set it to 0”

virtual void Function(const float x);

virtual void Function(const float x, const float y);

We want the y parameter, if omitted, to default to y=0. For this case there is a shorthand notation:

#ifndef SOMECLASS_H

#define SOMECLASS_H

class SomeClass {

public:

virtual void Function(const float x = 3.1415, const float y =0.);

};

#endif

You can give more than one default parameter:

SomeClass *sc;

sc->Function();

sc->Function(3.1415);

sc->Function(3.1415,0.);

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