Calling Base class constructor

[serkan]

Hi,
please see the following scenario.

class base{<br /> float rate;<br /> public:<br /> base(){}<br /> };<br /> class derived : public base{<br /> int principal;<br /> int year;<br /> public:<br /> derived(){}<br /> derived(int _principal, int _year)//// I am not initializing the base class<br /> ////constructor<br /> };<br /> main()<br /> {<br /> derived d(1222,5);<br /> }

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class base{<br /> float rate;<br /> public:<br /> base(){}<br /> };<br /> class derived : public base{<br /> int principal;<br /> int year;<br /> public:<br /> derived(){}<br /> derived(int _principal, int _year)//// I am not initializing the base class<br /> ////constructor<br /> };<br /> main()<br /> {<br /> derived d(1222,5);<br /> }

I have not writtent he body of the constructors. My question is I have not used the statement like derived(int _principal, int _year):base(_principal,_year)
and declared the default constructor in the base class i.e. base(){} so the compliler is calling that default constructor while I create the derived class constructor. Is there any draw back in this procedure……….?
Or always I sould call the constructor explicitly while creating the derived calss constructor and adding one more construcotor in the base class like this.

class base{<br /> float rate;<br /> public:<br /> base(){}<br /> base(int i, int j); ///////// additional constructor with 2 arguments<br /> };<br /> class derived : public base{<br /> int principal;<br /> int year;<br /> public:<br /> derived(){}<br /> derived(int _principal, int _year):base(_principal,_year)<br /> };<br />

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class base{<br /> float rate;<br /> public:<br /> base(){}<br /> base(int i, int j); ///////// additional constructor with 2 arguments<br /> };<br /> class derived : public base{<br /> int principal;<br /> int year;<br /> public:<br /> derived(){}<br /> derived(int _principal, int _year):base(_principal,_year)<br /> };<br />

Please suggest
 

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