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Constructor initialization lists
What is advantage of using Constructor initialization lists?
Paul_Singh
- Feb 7th, 2012
For some object the initialized list is necessary because they are const or do not have default constructors. However, the main advantage is that if you construct the object in the constructor body th...
abc
- Feb 5th, 2012
--> initializer list is used with constructor when any const datas are used in a class. --> bcoz, as we known const var should be initialized while declaring. --> the class gets memory allocatio...
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What is the difference between c&c++?
pammi_11
- May 31st, 2008
c is a procedural language. where as c++ is object oriented programming language.
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Difference between "vector" and "array"?
sivakumar.v
- Jul 3rd, 2008
Hi, for the above answer, i am little bit disagreeing, like VECTOR is UNIDIRECTIONAL ?? what does that mean ?? exactly, you mean to say that we cannot have multidimensional vectors ?? if that is ...
bhradwj
- Apr 4th, 2006
The main difference between vector and array isAlways vector is represented as uni-dimensional (ie., one dimensional) but whereas Array can be represented by both one-dimensional as well as two dimensional.Thanks....
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What are the key differences between C & C++
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SARAVANAN SIVAJI- Member Since Aug-2007 | Aug 1st, 2007
The main difference between C and C++ are:
1. C is a procedural language whereas C++ is a non-procedural language.
2. C gives importance to functions (methods) whereas C++ gives importance to both functions and data.
3. C allows the data to flow around the functions freely whereas C++ wraps up the data and functions together, due to that datas were not allowed to flow around freely in C++. This is said to be Encapsulation in C++
Other differences, ( actucally there is lot to mention......here are the two )1. C allows struct, union, and enum types to be declared in function prototypes, whereas C++ does not.
2. A struct, union, or enum declaration in C++ declares an implicit typedef, while in C it does not
SARAVANAN SIVAJI
- Aug 1st, 2007
One more point: we can include..........In C, the members in the struct, by default, public.In C++, the members in the class, by default, private.
SARAVANAN SIVAJI
- Aug 1st, 2007
The main difference between C and C++ are:1. C is a procedural language whereas C++ is a non-procedural language.2. C gives importance to functions (methods) whereas C++ gives importance t...
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What is proper and improper inheritance? Explain with an example?
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michaelpyles- Member Since Dec-2007 | Dec 29th, 2007
Proper inheritance occurs when the derived class "IS A" specialized type of the base class. Example Cat IS A Animal.
Improper inheritance occurs when a class is inherited from merely for code reuse, without having any other relationship. Example Cat Inherits from Engine. A Cat is not an engine however both an engine and a cat purr.yzesong
- Jul 31st, 2009
As long as no diamond problems (improper inheritance), single or multiple inheritance can all be proper inheritance. When usng multiple inheritance with diamond problem, you can use virtual inheritance to make the multiple inheritance a proper one.
michaelpyles
- Dec 29th, 2007
Proper inheritance occurs when the derived class "IS A" specialized type of the base class. Example Cat IS A Animal. Improper inheritance occurs when a class is inherited from merely f...
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Register Relation
Why p++ is faster than p+1?
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sahasranaman- Member Since Jul-2009 | Jul 1st, 2009
p++ is faster because on compilation, it gets translated to three machine instructions, where as p=p+1 needs four machine instructions. All machine instructions take the same time.
For p++, the instructions are:
mov ax,
inc ax
mov,
axFor p = p+ 1, the instructions would be,
mov ax,
mov bx, 1
add bx
mov,
axThis is why p++ is faster than p+1
Mann2920
- Jan 24th, 2011
To perform?i+1?complier has to do:1-Addition i+12-Assignment i=result of additionWhile in case of i++Value is simply increased by 1so i++ is faster
Gargona
- Feb 13th, 2010
Difference in assembler code:--$ diff -uN a2.S a.S--- ++p.S 2010-02-13 15:51:09.000000000 +0200+++ p+1.S 2010-02-13 15:50:30.000000000 +0200@@ -6,7 +6,6 @@&nb...
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What is memory leaking in c++ ?
ajrobb
- Sep 22nd, 2010
A memory leak in C++ is generally caused by not understanding the language.The std::auto_ptr<class> or similar should be used whenever allocating objects on the heap using new. This is essential...
SomGollakota
- Jun 13th, 2007
Memory leak is - dynamically allocating memory and forgeting to free it. In C++, using a new operator to allocate a chunk of memory, and forgetting to delete it. There are several reasons this could o...
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What is friend function?
As the name suggests, the function acts as a friend to a class. As a friend of a class, it can access its private and protected members. A friend function is not a member of the class. But it must be listed in the class definition.
charlie02
- Aug 9th, 2010
Friend function is a non-member function, which can?access the private member of a given class, only if it made as the friend of that class.
MCBod
- Mar 31st, 2010
A friend function is a special function that has been granted access to the priovate members of a specific class. The class itself is responsible for declaring the friendship. It is nto affected by in...
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C++ Interview Questions
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