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Question :

What happens to the member pointers when an exception occurs in constructor, while allocating memory?How can we over come this ?

Answer :

Offcourse it will result memory leak.... so use auto_ptr for such thing .. see following example, i have used two types to avoid memory leaks one is auto_ptr and another is initialize function #include <iostream> #include <memory> class DataClass{ public: int m_iValue; DataClass(int i =0):m_iValue(i){} void show(void) { std::cout<<std::endl<<"Value :- "<<m_iValue<<std::endl; } }; class ResourceLeakFreeClass{ public: std::auto_ptr<DataClass> m_Data1; DataClass * m_Data2; ResourceLeakFreeClass():m_Data1(new DataClass(100)),m_Data2(InitDataClass(200)){} ~ResourceLeakFreeClass(){ if(m_Data2){ delete m_Data2; m_Data2 = 0; } } DataClass * InitDataClass(int iData){ try{return new DataClass(iData);} catch (...) {delete m_Data2;throw;} } }; int main(int argc, char* argv[]) { ResourceLeakFreeClass RLFC; RLFC.m_Data1->show(); RLFC.m_Data2->show(); return 0; } Constructor can't throw Exceptions.  Posted by: jitendra singh       Contact Author © CoolInterview.com Today's Special: Get Free Magazine from SAP now! A D V E R T I S E M E N T

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Category	C++ Interview Questions
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Added	8/18/2006
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