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What is the output of printf ("%d")
rahulsahu2455
- Oct 7th, 2011
It will take top element of stack which use for allocate memory for variables, so it ll print the value of last declared variable
shibshankar
- Sep 6th, 2011
It will print 0.
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What is the relation between class and object in c++ ?
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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1.why constructor can't be virtual?2.what's the difference between destuctor and virtual destructor?
Jos Collin
- Oct 4th, 2011
That's not correct. The VTable will be created completely during compile time itself. The reason why constructor can't be virtual is that the virtual mechanism will work only on completely constructed...
anabarai
- Jul 5th, 2011
There is nothing like Virtual Constructor. The Constructor can’t be virtual as the constructor is a code which is responsible for creating an instance of a class and it can’t be delegated to any other object by virtual keyword means.
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The following code results in class eg { void ml( ) {int i = 6; for {int i=5: i< 10;i ++ } { if{i==6} continue; system.out.println {i} ; } } ; } 1. syntax / compilation error 2. 5 6 7 8 9 3. 6 7 8 9 4. 5 7 8 9
talktome.ruchi
- Sep 23rd, 2011
The correct answer is option 4, since the scope of both the i's are different so we can declare it multiple times
anabarai
- Jul 4th, 2011
If you see the for for block:
for {int i=5: i< 10;i ++ }
you will see that it has a semi colon after the int i=5 which results in a syntax error. so the answer would be 1. syntax/compilation error -
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.
Function Pointers
Why function pointers are not dereferanced?
mehulgala177
- Sep 22nd, 2011
It is possible to dereference a function pointer. By doing so, v will get the address of the function it points to. Try this code : "c #include #include using namespace std; ...
Oleg Alexandrov
- Jun 24th, 2011
Because there is no "object" or "value" which you'd get by dereferencing a pointer to it. Functions are not objects. You cannot copy them, delete them, create them using "new", etc. They only exist as...
What do you mean by pure virtual functions?
A pure virtual member function is a member function that the base class forces derived classes to provide. Normally these member functions have no implementation. Pure virtual functions are equated to zero. class Shape { public: virtual void draw() = 0; };
sachin_mundhra
- Feb 17th, 2010
Pure Virtual Function is a virtual function having no body.Example :-virtual void Display() = 0 ;
What is the technique for Fixing Code Errors
grimes13
- Sep 5th, 2011
First off for me there is no one technique.
Generally I do this:
1. Find out what the error is and reproduce it.
2. Create a test that should pass if the error is fixed.
3. Make my code pass that test.
This is not info on how to find a bug but on how I would go about fixing one.How many parameters can be passed to a function in c++ ?
gill
- Aug 27th, 2011
Arguments passed in a function are stored in the stack rather than the heap. Thus it depends on how much memory does the O.S allocates for stack in your program. There would still be practically no li...
burraganesh
- Dec 7th, 2008
Less than or equal to those mentioned in the prototype.Less when default arguments are also provided in prototype.
">What is the difference between "overloading" and "overriding"?
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Editorial / Best Answer
Answered by: Richa
- Sep 28th, 2005
Overloading a method (or function) in C++ is the ability for functions of the same name to be defined as long as these methods have different signatures (different set of parameters). Method overriding is the ability of the inherited class rewriting the virtual method of the base class.
swarn kant
- Mar 14th, 2006
All the above answers are right this is one more refinement.overridding is runtime polymorphism while overloading is compile time polymorphism.
priya
- Mar 5th, 2006
Overloading: the same function can perform different operations.overridding: the derived class can rewrite the content of the base class.
Inheritance
Which one of the following statements regarding C++ class inheritance is FALSE?
a. Inheritance promotes generic design and code reuse.b. Struct cannot be inherited in C++.
c. C++ supports multiple inheritance. d. Inheritance is a mechanism through which a subclass inherits the properties and behavior of its superclass.abhimanipal
- Feb 21st, 2010
The above answers are wrong. structs can be inherited in C++ . The only point to note is that for structs the defualt mode of inheritance for structs is public but for classes its private
What are the things contains in .obj file ? ( compiled result of .cpp file )
smart_coder
- Jan 25th, 2007
Object file is the representation of code that a compiler generates by processing a source code file. Object files contain compact code, often called "binaries". A linker is used to generate an execut...
divya
- Dec 22nd, 2006
I guess it contain stsrtup code assembly instruction which used by compiler to compile the code
">What are Virtual Functions? How to implement virtual functions in "C"
kamranahmad
- May 26th, 2008
Hi here i have more simplified example Hope this will give you clear view and check this linkhttp://www.codersource.net/published/view/325/virtual_functions_in.aspx#include <stdio.h>#include <...
SomGollakota
- Apr 21st, 2008
Sukesh, Your response is essentially correct if we are talking about pure virtual functions. However, when we talk about virtual functions, then we perhaps need to make a distinction between regu...
What is the difference between user defined object and Standard object?
Oleg Alexandrov
- Jun 25th, 2011
The difference pointed by the previous poster is very superficial. A "standard" object may have been defined by a "user", e.g., creator of a library.In C++ there is no discrimination against user-defi...
bornToLose
- Sep 22nd, 2007
Standard object is?that which is defined in header file which is develoved by C++ developer and contain in library of C++. It remain fix we cant make?different use. It is developed for specific purp...
Classes
How many parameters are there in a binary operator implemented as a friend?Choose one answer. a. 2 b. 0 c. 1 d. as many as you need
Oleg Alexandrov
- Jun 25th, 2011
Since it is a friend, it is not a member. So the syntax has to be operator myOperator(s1, s2). So there are two arguments.
Why size of an empty function is 5?
rahilchoudhary
- Sep 28th, 2010
There is no function to calculate the size of a function.And this 5 value of an empty function is a myth.Certain working programs can even have size of 4.Regards
ajrobb
- Sep 22nd, 2010
It isn't.#include <iostream>void f() {}int main() { std::cout << sizeof f() << 'n'; // fails to compile on g++ because return is void std::cout << sizeo...
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