yunisha pandey

• Jan 14th, 2015

And what are the disadvantages of operator overloading???

Nisikant

 Profile Answers by Nisikant Questions by Nisikant

• Jan 30th, 2009

When the operator operates on the user defined data type or operands behaves same as it operates on inbuilt data type that mechanism is known as operator overloading. The operator that performs the sp...

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vishwa

• Nov 16th, 2006

Yes, Mail can be overriden, but not overlaoded

Me

• Oct 19th, 2006

I believe that you may be able to override main (I haven't actually tried though..). I don't see why you'd get any linker errors if you re-def the entry point as a linker switch...Thoughts?Anybody have time to try? =D

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How will you write object into file using file concepts in C++?

Arman

• Jan 25th, 2018

You can write the object into file after serializing it. It is important to note that there are two types of objects: "persistence" and "non persistence". persistence objects are those which can be serialized and saved in file system.

hi

• Nov 9th, 2016

I think the final fobj.display_detail(); in your code needs to change to eobj.display_detail();

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sachin_mundhra

 Profile Answers by sachin_mundhra Questions by sachin_mundhra

• Dec 18th, 2009

Operator new works like malloc. Example:int *n; n = (int*) operator new(sizeof(int)); New Operator does the following:1) Calculate the memory 2) Allocate memory using operator new 3) Call the Constructor

satheesh83

 Profile Answers by satheesh83 Questions by satheesh83

• Oct 16th, 2009

New operator allows to allocate a memory from the heap, so a new instance of a class is created but operator New is used to overload the (new) operator just like overloading of other operators. A...

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mucdull

 Profile Answers by mucdull Questions by mucdull

• Nov 17th, 2008

int   iVar1;   // iVar1 is never initializedint   iVar2 = int();   // iVar2 will always be initialized with some initial valueThe latter should be used becaus...

Anil

• May 21st, 2007

Dependsif use in main both will get initialize to '0'.ie: global if use inside a function (local) iVar1 will be garbage, iVar2 will be initialised to '0';

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bapu_60

 Profile Answers by bapu_60 Questions by bapu_60

• Feb 20th, 2008

Multiplication is a costly operation,costlier than bit operations.So,it is a better practice to use bit operation that is << for multiplication and >> for divsion when you are multiplying with a factor of 2 otherwise its not suggested. 

praveennext

 Profile Answers by praveennext Questions by praveennext

• Jan 3rd, 2007

This can be a generic solution for x*y without using *.while(y>>=1){if(y | 1) tot+=x; x<<=1; }or,for( ; y ; y>=1, x<<=1 ) if(y | 1) tot+=x;or even stupid like, while(x--) tot+=y;        ;-)May be a brain teaser, but this may eat time.

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daljit.mca

 Profile Answers by daljit.mca Questions by daljit.mca

• Aug 25th, 2010

Suppose you have two derived classes B and C that have a common base class A, and you also have another class D that inherits from B and C. You can declare the base class A as virtual to ensure that B and C share the same subobject of A.Dj.Maan

dasam

 Profile Answers by dasam Questions by dasam

• Mar 29th, 2007

If we are working with multiple inheritance, it is always better to make the base class as virtual inorder to avoid the multiple copies of the base class data. :)

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Niranjan.ambati

 Profile Answers by Niranjan.ambati Questions by Niranjan.ambati

• May 8th, 2009

Encpasulation is the process of packaging the classes into the public interfaces and private implementation,?so that, any changes in the code will not?effect the implmentation. The interfaces?shoul...

r v p

 Profile Answers by r v p Questions by r v p

• May 7th, 2008

Encapsulation is an OOP principle of placing the data and functionality within a single entity. This is so that all the functions that access the internal representation of the data type must be part of the data type definition.

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dkuy1

 Profile Answers by dkuy1 Questions by dkuy1

• Aug 9th, 2009

The Standard C++ language definition says: A class with an empty sequence of members and base class objects is an empty class. Complete objects and member sub-objects of an empty class type shall h...

santhosh.kanchanapally

 Profile Answers by santhosh.kanchanapally Questions by santhosh.kanchanapally

• Feb 18th, 2009

Hence the size of an empty structure is 1 byte

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What does this function do:string f(const string &x) { return x.empty()? x : f(x.substr(1)) + x[0];}What does this piece of code perform:char *a=...., *b=....;while(*b++ = *a++);

shantanu_hbd

 Profile Answers by shantanu_hbd Questions by shantanu_hbd

• Apr 25th, 2009

Second function is copying 'a' to 'b' provided that 'a' should be a null terminated string.

santhosh.kanchanapally

 Profile Answers by santhosh.kanchanapally Questions by santhosh.kanchanapally

• Feb 17th, 2009

Char *a="hai", *b="san";while(*b++ = *a++);This program leads to crash, as we are assigning one memory location to other memory location.

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Aleem Khowaja

• Oct 27th, 2011

Overloading: In overloading we can use same name of function but different argument, it is used for perform task for different purpose..... Example: void Add(int a, int b){ } void Add(int ...

Timothy

• Oct 24th, 2011

The main difference between overloading and overriding is that in overloading we can use same function name with different parameters for multiple times for different tasks with on a class. and ov...

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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

 Profile Answers by sachin_mundhra Questions by sachin_mundhra

• 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

 Profile Answers by ajrobb Questions by ajrobb

• 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

 Profile Answers by keloth1987 Questions by keloth1987

• 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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