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What is Smart Pointer?
remoprakash
- Jul 24th, 2007
Smart pointers are objects which store pointers to dynamically allocated (heap) objects. They behave much like built-in C++ pointers except that they automatically delete the object pointed to at the ...
Prakash
- Jul 24th, 2007
Smart pointers are objects which store pointers to dynamically allocated (heap) objects. They behave much like built-in C++ pointers except that they automatically delete the object pointed to at the ...
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How to create an object such that it should not call constructor by default.
Indrajit
- Jul 22nd, 2007
Virsa's questions, why constuctors cannot be private and the difference between... are not related to the original question at all, and I simply don't understand why people even take the pain of answe...
dasam
- Mar 29th, 2007
Adam is absolutely correct. It is not illegal to make the constructor as private. We generally do this while creating the singleton class patterns.
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What are inline functions?
Saranga Amarasinghe
- Jul 20th, 2007
By adding key word inline before the function name in the declaration, allows the function to be defined in the same file, in most case the header or the .h file without doing so in .cpp file.Eg:-inline LONG GetSeedValue(CEndUserRec* record) { return record->ENDUSERSID;}
amit mahajan
- Oct 5th, 2005
inline functions are the functions with the keyword inline written prior to their declaration in a class.it has the advantage that if a function is made inline than the code of the called function is ...
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What are the advantages or disadvantages of making the Constructor Private?
vikaspachauri
- Jun 13th, 2007
Disadvantage:- You cann't create object of that particular class.Advantage:- you can bound the user to use the static function of that class to create the object so that your function can keep track of all the objects created ,according to the implementation of that function.
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Anybody knows how to convert object of one class to object of another class using type conversion? i read in a c++ book simply assign it like this obj1=obj2 where both are objects of different classes..but its not working..plz tell ..thanks in advance :)
vikaspachauri
- Jun 13th, 2007
I think to convert one class object to other can only be done either by using operator overloading of assignment operator or by creating a function which can assign the values of diffrent varaibles explicitly.
Madhurgeek
- May 28th, 2007
This can be done through pointers like A *a1 and B *b1 ok. Then you have to assigh some value to *a1 and *b1 but remember with the use valueat sign(*). Now your task is to convert the objec...
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Difference between realloc() and free()?
The free subroutine frees a block of memory previously allocated by the malloc subroutine. Undefined results occur if the Pointer parameter is not a valid pointer. If the Pointer parameter is a null value, no action will occur. The realloc subroutine changes the size of the block of memory pointed to by the Pointer parameter to the number of bytes specified by the Size parameter and returns a new...
SomGollakota
- Jun 13th, 2007
free() - releases the memory of the pointer passed as parameter, to the OS/application consumption. Using the pointer after free() will result in undefinded resultsrealloc() - used to resize the memor...
Roopesh Majeti
- May 27th, 2007
Mitra,as you mentioned that realloc will delete the existing memory and allocate the new memory . I tried it on solaris and following is found :1. If the new size allocated is less than the existing m...
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What is RTTI?
Runtime type identification (RTTI) lets you find the dynamic type of an object when you have only a pointer or a reference to the base type. RTTI is the official way in standard C++ to discover the type of an object and to convert the type of a pointer or reference (that is, dynamic typing). The need came from practical experience with C++. RTTI replaces many homegrown versions with a solid, consistent...
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What happens to the member pointers when an exception occures in constructor, while allocating memory ? how can we over come this ?
heyjoe
- May 22nd, 2007
When a constructor throws an exception then it means that constructor failed (duh!!) and the object is never created.Just write a simple class to test it out yourself.
mohit12379
- Jul 28th, 2006
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...
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How and when are the destructors called? Is it necessary to write a destructor?
scott
- May 8th, 2007
Destructors in C++ need not be called explicitly. The destructor for a class whether one has defined it or not gets called automatically and all objects associated with the class gets destroyed in the order of descending appearance in the class.
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Is Templates also a type of Static Polymorphism?
dasam
- Mar 29th, 2007
Template classes are used to implement function overloading, which is done during the compile time. So it is compile time polymorphism.
Sri
- Nov 20th, 2006
Yes...templates are static polymorphism...
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What is difference between object oriented programing language and structure oriented programing?
sangappa_geek
- Mar 20th, 2007
We can resuse the code in object oriented language. we can handle errors properly.everything relates to real world objects.
kesi
- Feb 26th, 2007
Object Oriented Programming : It means, which follows object oriented concepts that is object oriented programming for example : c++, javaand also c++ is not complete objected oriented. But...
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How to write a program for singleton class?
paulsonpaulc
- Feb 6th, 2007
Both the above methods doesn't meet the purpose. Try thisclass singleton{ private: /*add what ever data members necessary*/ static singleton* obj...
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What is the Basic nature of "cin" and "cout" and what concept or principle we are using on those two?
Basically "cin and cout" are INSTANCES of istream and ostream classes respectively.And the concept which is used on cin and cout is operator overloading. Extraction and Insertion operators are overloaded for input and ouput operations. Reference:: Object oriented programming in C++ By E.Balagurusamy
smart_coder
- Jan 25th, 2007
Cin and cout are both objects of iostream class which we use to get input from user and present output to user respectively' ' are overloaded operators in iostream classwhen you write : cout
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"Given a MAKEFILE (yeah a makefile), design the data structure that a parser would create and then write code that iterates over that data structure executing commands if needed.
dilipiyer
- Jan 24th, 2007
In a makefile, the command starts with a . All we need to do is identify the line starting with the and execute it with popen() or system command. Each command line is preceded by its call name. eg:all: gcc hello.cSo when we call make all. it runs gcc hello.c.
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C++ Interview Questions
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