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What happens to the member pointers when an exception occures in constructor, while allocating memory ? how can we over come this ?
heyjoe
- May 22nd, 2007
When a constructor throws an exception then it means that constructor failed (duh!!) and the object is never created.Just write a simple class to test it out yourself.
mohit12379
- Jul 28th, 2006
Offcourse it will result memory leak.... so use auto_ptr for such thing .. see following example, i have used two types to avoid memory leaks one is auto_ptr and another is initialize function#include...
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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...
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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.
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Function Linkage Mechanism
What is function linkage mechanism? Can inline function be used at run time? Why or why not?
sunil
- Jul 26th, 2014
Inline functions body are made to expand at compile time. So they are expanded at the time of compilation, since compiler decides whether the function is going to be inline or not.
std.approach
- Jun 11th, 2013
This link may be helpful
http://www.exforsys.com/tutorials/c-plus-plus/inline-functions.html -
Function pointer
How to assign function pointer to static function?
ak.nextptr
- Jul 31st, 2012
If int fn(char ch,int a) is static function then
function pointer type to above static function will be
int (*)(char , int )cooder
- Apr 26th, 2012
Using the class name. In case of non static function we need to use the this pointer.
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What are the advantages or disadvantages of making the Constructor Private?
vikaspachauri
- Jun 13th, 2007
Disadvantage:- You cann't create object of that particular class.Advantage:- you can bound the user to use the static function of that class to create the object so that your function can keep track of all the objects created ,according to the implementation of that function.
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How and when are the destructors called? Is it necessary to write a destructor?
scott
- May 8th, 2007
Destructors in C++ need not be called explicitly. The destructor for a class whether one has defined it or not gets called automatically and all objects associated with the class gets destroyed in the order of descending appearance in the class.
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What is the Basic nature of "cin" and "cout" and what concept or principle we are using on those two?
Basically "cin and cout" are INSTANCES of istream and ostream classes respectively.And the concept which is used on cin and cout is operator overloading. Extraction and Insertion operators are overloaded for input and ouput operations. Reference:: Object oriented programming in C++ By E.Balagurusamy
smart_coder
- Jan 25th, 2007
Cin and cout are both objects of iostream class which we use to get input from user and present output to user respectively' ' are overloaded operators in iostream classwhen you write : cout
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Explain "passing by value", "passing by pointer" and "passing by reference"
pramay
- Mar 10th, 2006
Pass By Value example:The function receives a copy of the variable. This local copy has scope, that is, exists only within the function. Any changes to the variable made in the function are not passed...
rahultripathi
- Sep 24th, 2005
There is major defference between these three are when we want to avoid making the copy of variable and we want to change value of actual argument on calling function. there are we use passing by pointer,passing the reference. We can not perform arithmentic operation on reference.
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What is framework in C++?A framework is a collection of classes and applications, libraries of SDKs and APIs to help the different components all work together
wanttochange
- Jan 10th, 2008
This question seems to be misterious...anyway......we have some library that we use for our workfor sdk we use win32apifor mfc we have wraped the win32api in to the classes wat frame work u taking about?can u clear the q?
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Design a class for car inventory . For every new car from the manufacturer there should be minimal changes to the code.
wanttochange
- Jan 10th, 2008
if you want to do minimal change always go for polymorphic classes..first find the services you need ...& designa interface class that contain all methodsvirtual....now we can have different cars....
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What is static array?and how it differs from char *ptr?
kalayama
- Dec 5th, 2006
A static array is an array with fixed number of dimentions and each dimention will have fixed length. You can not change the dimentions of the Static array during runtime.ex: int arr[10][20] It has Tw...
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"Given a MAKEFILE (yeah a makefile), design the data structure that a parser would create and then write code that iterates over that data structure executing commands if needed.
dilipiyer
- Jan 24th, 2007
In a makefile, the command starts with a . All we need to do is identify the line starting with the and execute it with popen() or system command. Each command line is preceded by its call name. eg:all: gcc hello.cSo when we call make all. it runs gcc hello.c.
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How to overload enum operator.
kalayama
- Dec 5th, 2006
Enum is not an operator. It is a datatype. Hence it can NOT be overloaded as an operator.You can define operations on enum datatypes and Overload operators for perfoming operations using enum though.I...
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What is an escaping variable
tehoclub
- Jan 22nd, 2008
Escaping variable uses when you want to break loop.int flag = 1; //flag is an escaping variablefor(...){ for(...) { flag = 1; ... if(..) { flag = 0; break; } } if(flag==0) break;}
C++ Interview Questions
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