Ashish

• Jan 7th, 2007

include<iostream>#include<fstream>using namespace std;int main(){             fstream *obj = new fstream();    &n...

Jayashree

• Jul 26th, 2006

#include "stdafx.h"#include "string.h"#include "process.h"int main(int argc, char* argv[]){ char cmd[125]; strcpy(cmd, "type "); strcat(cmd, __FILE__); system(cmd); return 0;}

Answer Question  Select Best Answer

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...

Answer Question  Select Best Answer

ajrobb

 Profile Answers by ajrobb Questions by 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

 Profile Answers by SomGollakota Questions by 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...

Answer Question  Select Best Answer

Why p++ is faster than p+1?

Read Best Answer

Editorial / Best Answer

sahasranaman  

 Profile Answers by sahasranaman Questions by 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,
ax

For p = p+ 1, the instructions would be,
mov ax,
mov bx, 1
add bx
mov,
ax

This is why p++ is faster than p+1

Mann2920

 Profile Answers by Mann2920 Questions by 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

 Profile Answers by Gargona Questions by 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...

Improve Answer

Read Best Answer

Editorial / Best Answer

michaelpyles  

 Profile Answers by michaelpyles Questions by 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

 Profile Answers by yzesong Questions by 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

 Profile Answers by michaelpyles Questions by 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...

Improve Answer

Read Best Answer

Editorial / Best Answer

SARAVANAN SIVAJI  

 Profile Answers by SARAVANAN SIVAJI Questions by 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

 Profile Answers by SARAVANAN SIVAJI Questions by 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

 Profile Answers by SARAVANAN SIVAJI Questions by 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...

Improve Answer

sivakumar.v

 Profile Answers by sivakumar.v Questions by 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....

Answer Question  Select Best Answer

hardikrlakhani

 Profile Answers by hardikrlakhani Questions by hardikrlakhani

• Jun 5th, 2011

c is program oriented language and c++ is a object oriented language

pammi_11

 Profile Answers by pammi_11 Questions by pammi_11

• May 31st, 2008

 c   is a procedural language. where as c++ is object oriented programming language.

Answer Question  Select Best Answer

What is advantage of using Constructor initialization lists?

Paul_Singh

 Profile Answers by Paul_Singh Questions by 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...

Answer Question  Select Best Answer

NikunjSingh

 Profile Answers by NikunjSingh Questions by NikunjSingh

• Feb 23rd, 2012

1. using normal object creation: Shape obj; 2. copy ctor: Shape obj2=obj;// or Shape obj3(obj); 3. using new operator;

Code
#include <iostream>
"Shape...""Copy called""new....""allocation fail : no free memory"

Isaac

• Feb 21st, 2012

1. Create on stack. i.e. ClassA varA;
2. Create on heap. i.e. ClassA *ptrA = new ClassA;

Answer Question  Select Best Answer

NikunjSingh

 Profile Answers by NikunjSingh Questions by NikunjSingh

• Feb 23rd, 2012

Destrcutors can be made private to stop user from creating objects on stack. One can still create objects on stack using a static function as member function. But if intention is not to let user crea...

mehulgala177

 Profile Answers by mehulgala177 Questions by mehulgala177

• Sep 22nd, 2011

YESSSS destructors can be private. Infact this concept is used in Singleton design pattern. So, outsiders cannot delete object of that class. It has to b deleted from the class itself. I know...I...

Answer Question  Select Best Answer

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();
}

Answer Question  Select Best Answer

Bishoy

• Oct 20th, 2012

Local variables are stored in stack - each method have a stack frame (a fixed size of memory in the stack) that is allocated for local variables each time the method is called, and deallocated when th...

Ramanuj

• Oct 20th, 2012

Hi,

I have a query. The lifetime of the static variable is the entire program - if it is a local auto variable (i.e., not dynamically allocated), will it contribute to the peak memory ?

Regards,
Ramanu

Answer Question  Select Best Answer

Write a program for four atrithmetic operations in matrix using operator overloading.

JoolsL

• Nov 19th, 2012

In both the above answers the op overloads should be using a const ref as input. You should have a (private) ctor that makes the matrix from the data, and should use RVO in the return.

binoy

• Aug 23rd, 2012

Code
#include<iostream.h>
#include<conio.h>
/* function to check whether the order of matrix are same or not *//* function to read data for matrix*/"enter the number of rows
""enter the number of columns
""enter the elements of the matrix
"/* function to add two matrix *//* function to subtract two matrix *//* function to display the contents of the matrix */" "/* main function */"Addition of matrices
""the result is
""subtraction of matrices
""The result is 
""order of the input matrices is not identical
"

Answer Question  Select Best Answer

Abstraction is of the process of hiding unwanted details from the user. 

Ramya

• May 31st, 2013

Mechanism of exposing only the interface and hiding the implementation data from user.

mukrram ur rahman

• Dec 10th, 2012

Abstraction exactly involve the process of involving relevant things while ignoring the irrelevant things.

Answer Question  Select Best Answer

harshitha

• Feb 8th, 2014

Ptr is a constant pointer to constant integer. Both the values cant be changed.
eg:
const int a=10;
const int *const ptr=&a;
int b=20;
const int *const ptr=&b;//error
a=25;//error

Jagadeesh Arikuti

• Jul 5th, 2012

Both are Constant
const int i=10;
const int * const ptr=&i;

You are not allowed to change int i are pointer ptr

Answer Question  Select Best Answer

ishanaditya

 Profile Answers by ishanaditya Questions by ishanaditya

• Sep 1st, 2014

There is nothing really wrong with C++ anymore. The few reservations I had personally have been fixed with the latest C++11 standard: - C++ wasnt really designed for writing multithreaded application...

robertgbjones

 Profile Answers by robertgbjones Questions by robertgbjones

• Aug 5th, 2014

Compared to what? C++ is a potentially low-level, close to the metal language, so potential for performance, though perhaps not as much as assembler, conversely its quite hard to learn, and now a big ...

Answer Question  Select Best Answer

cclass base
{
public:
virtual void display(int i = 10)
{
cout

rohit suri

• Sep 11th, 2014

Base class display method will called

reddy-

• Apr 10th, 2013

Overriding function default argument takes more precedence ,Hence based class default argument 10 will be initialized to i.So i value holds 10 will be printed for this call with derived count statement.

Answer Question  Select Best Answer

While doing inheritance in C++, one thing that is not inherited is what?

rohit suri

• Sep 11th, 2014

There are four things which r not inherited in c++
1>Constructor
2>Destructor
3>Assignment operator
4>copy constructor
5>Friend function

Johnny

• Jan 7th, 2014

Friend declarations.

Answer Question  Select Best Answer

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.

Answer Question  Select Best Answer