Overload the postfix and prefix version of ++
//prefix version of ++ ThreeD ThreeD::operator++() { x++; // increment x, y, and z y++; z++; return *this; } //postfix operator ++ ThreeD ThreeD::operator++(int notused) { x++; // increment x, y, and z y++; z++; return *this; // return original value }
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