-
Inheritance
What is inheritance? why we use it? plzz can anybody explain me with one example and where we use that concept?
navneet.navu
- Apr 19th, 2010
It is an object oriented feature which provides the reusablity of code. All the properties defined in the parent class can be used by its child classes without writing the code again.
Samuel Rengarajan
- Dec 11th, 2009
All Common features are come to parent class. So we can extend this class to child classes. Child classes contais some special features.Useage of inheritance : it reduce the code. If we use inheritance, we avoid redundent code.
-
Inline Function Advantages
What are the advantages of inline functions over macros?
ashwin2090
- Aug 28th, 2009
Inline function very much confused to use it or not.Well I want to just tell you that it has large number of disadvantages than advantages Inline function works faster than normal function. They are ...
AnisHasan
- Jul 16th, 2009
Beside the adventages which are mentioned there are some more advantages of Inline Functions over Macros1> Macro call is resolve at the compile time and compiler replce Identifier with charecter se...
-
Placement New Syntax
How can a C++ developer use the placement new syntax to make new allocate an object of class SomeClass at a particular memory address stored in a pointer type variable named pmem?A. new SomeClass(pmem);B. new(pmem) SomeClass;C. new SomeClass pmem;D. new pmem SomeClass;E. new (pmem, SomeClass);
ajrobb
- Sep 22nd, 2010
BWhere you use placement new, it is important to explicitly call the destructor for the object before re-using the memory.Fred * fred = new(pmem) Fred();...fred->~Fred();fred = 0;George * george(pmem) George();
akash_saxena
- Dec 22nd, 2009
It is B. new(pmem) SomeClass;pmem points to the memory which shall be used.
-
-
What is the use of delete operator in c++?
Amit
- Jan 6th, 2012
Delete: is used to deallocate memory from the heap that is created by new.
When you call delete, it firstly call the destructor of that object and then deallocate memory from heap.
class A
{
};
int
main()
{
A *a = new A();
delete a;
A *arr = new A[10];
delete []arr;
} -
Inheritance in C++
While doing inheritance in C++, one thing that is not inherited is what?
-
C/C++ black screen opens and closes
While executing a program in C++, it happens the black screen opens and closes automatically without displaying the output(program is correct). How to recover from this situation?
-
Read the following code and then implement the following parts:
Read the following code and then implement the following parts:
class Point {
public int xCoordinate;
public int yCoordinate;
}
1. Derive a class from Point and call it DerivedPoint, the new class will contain two constructors, the first one takes no arguments, it assigns the point to the point (1,1) and the second constructor takes two parameters...kladarak
- Nov 28th, 2015
danarusus answer was pretty much there, but there are a few things that could be improved with it. - Display() doesnt output x and y coords in exactly the format requested. There should be no space...
ThePurpleTwist
- Nov 12th, 2015
There is a mistake in the code submitted by chandra ;
DerivedPoint : public Point instead of "::" -
Why Pointers are not used in C Language. What are the main differences between C and C++
-
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.
-
What is difference between inline function and ordinary function?
sachin_mundhra
- Jan 28th, 2010
Inline function should be small in terms of line of code. Complier will replace the code whenever inline function gets called.
wow_suraj
- May 2nd, 2008
In case of ordinary function, when calling the function the scope jumps to the function and after return jumps back to the function call statement resulting in some extra execution time. While in case...
-
What is the difference between structures and classes in C++?
There is only one difference ,in classes the members are private by default whereas it is not so in structures.
sripudi
- Jan 5th, 2009
There are a lot of differences between Structure & Class in C.But in C++ the only difference is the members structure are by default public where as class members are by default private.Using C++ structure?we can do the OOPS concepts like inheritance
berezleon
- Dec 1st, 2007
Amid, you are talking about "C" structure that knows nothing about classes etc. The only difference between C++ class and struct is default access specifier (private and public respectively)
-
What is defference between constructor and destructor
srabani_mazumder
- Aug 30th, 2010
Like constructor, the destructor is a member function whose name is the same as the class name but is preceded by a tilde. For example the destructor of a class integer can be define as :- ...
ankitagujrati28
- Jul 21st, 2010
Constructor is the member of a class which is called implicitly when the instance of class is created. It allocates the memory to data.Same as destrutor is also a member of a class. It is called implicitly at the end of execution of class. It deallocates the memory.
-
Count Number of characters using Pointers
Write a program to count the number of characters in a string using pointers.
madhuti
- Sep 29th, 2009
Int main(void) { char* str = "Hellolklklk"; int i=0; for(i=0; *str; i++, str++); printf("count= %dn", i);return 0;}
paindriven
- Jun 12th, 2009
unsigned int charCounter(char const* str){ unsigned int counter = 0; char const* data = str; while (data != NULL && *data != '') { data++; counter++; } return counter;}
-
What do you mean by inheritance?
Inheritance is the process of creating new classes, called derived classes, from existing classes or base classes. The derived class inherits all the capabilities of the base class, but can add embellishments and refinements of its own.
-
What is encapsulation?
Packaging an object’s variables within its methods is called encapsulation.
-
What do you mean by binding of data and functions?
Encapsulation.
-
">
Difference between "C structure" and "C++ structure".
sachin_mundhra
- Dec 18th, 2009
No concept of encapsulation, code is different than the data in case of C structure. This is possible in C++ structure.
samitriani
- Jul 8th, 2008
C does not have limitation access. Structures in C are used to regroup data from different types.In C++ structure have limitation access propreties (private,public protected) with public access as default, can contain methods and can be used as a class.
-
-
What is the use of virtual destructor?
mehulgala177
- Sep 22nd, 2011
You should always keep your destructors virtual when u r dealing with Inheritance. Try this Code :
Code- #include <iostream>
- #include <tchar.h>
- " Destroying Parent
- "" Destroying Child
- "Also try the same code without using virtual keyword before ~Parent() u will see the difference... :)
rimsha
- Jul 27th, 2011
Virtual destructor is used to delete the dynamically allocated memory via a base class ptr.
Ans