This class implements function which can be used in ICalculator to calculate result of argument multiplied by himself.

You can find more information in comments below. Overrided methods can be found in corresponding base class or interface.

class CProcedureSqr :public CProcedure
    {
    public:
        CVariable *Calculate(CVariable *parent, CVariable *args) override;
    
        CProcedureSqr();
    };