To invoke the virtual toString() function defined in GeometricObject from a Circle object c, use :A. ((GeometricObject*)c)->toString();B. c.super.toString()C. (GeometricObject*)c->toString();D. c->GeometricObject::toString()

vijay.badola

 Profile Answers by vijay.badola Questions by vijay.badola

• Dec 31st, 2009

If we take the following class definitions:class CGeometricObject{public:virtual void toString(){ printf("I am in base");}};class Circle : public GeometricObject{public:void toString(){...

sachin_mundhra

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• Dec 18th, 2009

C) (GeometricObject*)c->toString();

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Base class has some virtual method and derived class has a method with the same name. If we initialize the base class pointer with derived object, calling of that virtual method will result in which method being called?

Vincent Monsen

 Profile Answers by Vincent Monsen Questions by Vincent Monsen

• Jan 31st, 2011

The derived class method will be called because the method is declared virtual in the base class.? Dynamic binding enables this.

ajrobb

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• Sep 22nd, 2010

This is polymorphism, an object with at least one virtual method. When a polymorphic object is constructed, it includes a hidden vtable containing virtual function pointers and other polymorphic infor...

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What is Static Polymorphism? Give its syntax and simple example.

rdl

• Dec 28th, 2014

The call to a function is resolved at compile time. Eg., function overloading and templates.

Youssef Arbach

• Dec 12th, 2014

Static polymorphism could be seen also with Templates, since the selection of the write function is done at compile time. Usually with inheritance (and call-by ref sure) polymorphism is dynamic, unless it is a call by-value, then there would be no morphism at all.

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surendrap

 Profile Answers by surendrap Questions by surendrap

• Oct 4th, 2011

Simple class is template.no memory is allocated to class until object is declared of that class.

kaviraj

• Sep 30th, 2011

Class is a collection of objects shared a common name ,an object is a runtime entity of a class,using the object we can access class members and functions easily.

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Zubair

• Jan 18th, 2012

Yea It is possible in C++. Here is the code snippet. "cpp using namespace std; class Sample; class SampleBase { friend class Sample; public: private: SampleBase() { } Samp...

Amit

• Jan 6th, 2012

If you make all the constructor and assignment operator private of a class then logically you can prevent any other class to use your base class. Even your derived class can inherit the base class (t...

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sakshi

• Oct 4th, 2012

Code
span style="color: #ff0000;">"factorial of the no :"+f);
 
Console.ReadKey();
}

Anugya Singh

• Sep 4th, 2012

Code
#include<iostream.h>
#include<conio.h>
"Enter the Number whose factorial value is to be find 
""Fctorial is "<<f;
getch();
}

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Write a program to display all possible permutations of a given input string--if the string contains duplicate characters, you may have multiple repeated results. Here is a sample for the input cat
cat,cta,act,atc,tac,tca

Jin Hyuk Cho

• Feb 3rd, 2016

A working example

Code
#include <iostream>
#include <string>
#include <set>
#include <sstream>
// constructing remaining characters
// constructing empty set for results
//cout << onePermute << endl;
" ""Done!"

neha

• Aug 27th, 2015

plz see below code"cpp #include #include using namespace std; void Permutations(string str) { for(int i = 0; i < str.size(); i++) ...

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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

 Profile Answers by charlie02 Questions by 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

 Profile Answers by MCBod Questions by 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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A scope resolution operator (::), can be used to define the member functions of a class outside the class.

keloth1987

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• Nov 7th, 2011

You can tell the compiler to use the global identifier rather than the local identifier by prefixing the identifier with ::, the scope resolution operator. :: identifier class-name :: identifier name...

rajendra chaudhary

• Nov 1st, 2011

It is an operator :: used mainly in class for defining the member functions and also for accessing the global variables.
and it is a eye of c++.

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Friend classes are used when two or more classes are designed to work together and need access to each other's implementation in ways that the rest of the world shouldn't be allowed to have. In other words, they help keep private things private. For instance, it may be desirable for class DatabaseCursor to have more privilege to the internals of class Database than main() has.  

sivakumar.v

 Profile Answers by sivakumar.v Questions by sivakumar.v

• Jul 3rd, 2008

Virtual class :: It is an inner class which can be overriden by the derived classes.

SomGollakota

 Profile Answers by SomGollakota Questions by SomGollakota

• May 25th, 2008

Answering amarendra.moharana's question.Amarendra, My apologies that it took so long to answer your question. Haven't logged in for quite a while.In class D of your example, you will still hav...

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Virtual destructors: If an object (with a non-virtual destructor) is destroyed explicitly by applying the delete operator to a base-class pointer to the object, the base-class destructor function (matching the pointer type) is called on the object.   There is a simple solution to this problem – declare a virtual base-class destructor. This makes all derived-class destructors virtual even...

Eric Nantel

• Apr 23rd, 2015

There is no virtual constructor !

Tausif

• Nov 29th, 2014

Constructor can be virtual function because constructor get invoked whenever an object is created, which take place at compile time. But in the case of virtual function binding takes place at the run time.

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prerna chavan

• Jul 25th, 2011

External,
Register,
Static,
Automatic

srivallabh

• Jul 24th, 2011

Extern,auto,register,static.

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Krishna Kumar

• Sep 25th, 2018

There is three query for the above question, 1) Why reference object passed as parameter to the copy constructor? 2) Why pointer object is not passed as parameter to the copy constructor? 2) What r...

WinSound

 Profile Answers by WinSound Questions by WinSound

• May 31st, 2010

Copy constructor syntax:A(const A&) for the class "A"const - Indicates object passed as argument is not changed inside copy constructor so there may be 3 design possibliti...

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Hi I very recently did the C++ online Quiz and was surprised to find that my answer (1) to the following question (below) was incorrect. Is there something I am missing here, or is the answer incorrect. I thought this was the point of Private. "Always inaccessible regardless or derivation access".Apparently (3) in the correct answer! according to the quiz!The private member in derived class ...

abooorah515

 Profile Answers by abooorah515 Questions by abooorah515

• May 10th, 2010

Cannot be inherited

j_l_larson

 Profile Answers by j_l_larson Questions by j_l_larson

• Oct 19th, 2009

You can if the base class provides public or protected methods that modify its private data.  Then derived class can expose this using access specifiers.

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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

 Profile Answers by SomGollakota Questions by 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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 The idea behind inline functions is to insert the code of a called function at the point where the function is called. If done carefully, this can improve the application's performance in exchange for increased compile time and possibly (but not always) an increase in the size of the generated binary executables.  

Sampada Wadkar

• Apr 9th, 2012

An Inline function is a function that is expanded in line when it is invoked. That is compiler replaces the function call with the corresponding function code.. :)

Code
CO06203

MCBod

 Profile Answers by MCBod Questions by MCBod

• Mar 31st, 2010

An inline function is a function where a copy of the logic is embedded in the application at each the point where it is called by the compiler. This basically allows a reduced overhead in function dereferencing

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sachin_mundhra

 Profile Answers by sachin_mundhra Questions by sachin_mundhra

• Jan 28th, 2010

Pointer can be NULL but reference cannot be NULL.For example, If you write int &a; // This will give compile error, because reference cannot be NULL.

pammi_11

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• May 10th, 2008

Pointer holds the address of a variable.reference holds the address of duplicate of that variable.

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Hint FO is mechanism in which two functions r having same name with diff no. of arguments.

thash

• Feb 10th, 2018

Two or more function can have same name but different from types or number of argument.

abhi

• Jul 8th, 2017

Because it allows you to do multiple work with same function call.

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yzesong

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• Jul 31st, 2009

They have almost same lifetime(local is shorter), but different access scope.

burraganesh

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• Dec 7th, 2008

For both these the default initial value is 0A static global variable can only be accessed in the file it exists, we cannot use it in other files, even after mentioning it as externIn static local var...

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vijay.badola

 Profile Answers by vijay.badola Questions by vijay.badola

• Oct 4th, 2009

In LINUX environment one can use VALGRIND and MPATROL free tools to find out possible memory leaks in programs.

santhosh.kanchanapally

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• Feb 18th, 2009

By overloading the new and delete operators, we can find the memory leaks as shown in following program ,#include "stdafx.h"#include <iostream>#include <string>using namespace st...

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