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If static int temp; defined in one file1, then can we use this same temp variable in file 2 ? Is it possible to do this with EXTERN ?
kalayama
- Dec 5th, 2006
Well, the static variable should not be accessed from outside the file in hich it is defined. That's how static is defined.The intended purpose of static is to make the variable "invisible" to other programs.Hence you must use extern if you want to access it across files.Cheers,Kalayama
Arun
- Nov 30th, 2006
Hi, We can't able to use more than one storage class specifier in same variable.Regards,ARUN
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Under which conditions compiler provide default constructor to an object when no default constructor is defined in the class definition?
Prasad2008
- Jun 10th, 2008
If the class designer has not provided any constructor within the class, but we are trying to create an object of that class without passing any argument , then compiler will provide a defau...
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What are Polymorphic Classes?
Khansnaina
- Sep 20th, 2019
I want implications of polymorphic use of classes
Niranjan.ambati
- Apr 9th, 2009
Polymorphic means many forms. The object of the polymorphic class pointer can store any derived class objects and called respective member functions when its object member functions is called automati...
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Virtual key word
can access any private member of the base class through the derived class FUNCTION IF IT IS VIRTUAL?
burraganesh
- Dec 7th, 2008
No way,Ex:#include<iostream>using namespace std;class base{ private: int a; public: ...
arun_goel3
- Jul 15th, 2008
using typecasting and virtual we can access the private member of base class#include <iostream>using namespace std;class base {int i;virtual void update(int j) {cout << "in base updat...
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Exception handling vs. return values to signal an error
Why we would use exception handling rather than different return values to signal an error?
ajrobb
- Sep 22nd, 2010
When programs throw and exception, control is transferred to the innermost matching catch statement. If the exception is not caught with the program, the program terminates. All automatic variables ar...
thumbeti
- Nov 1st, 2009
Using exceptions, it becomes easy to pass multiple types?of values from a single function. Handling the exceptions is hirachical.If we dont have exceptions, it will be difficult to return multiple values from a function.
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What should you do gain access to Private Base Class Data
tapan.gajera
- Jan 3rd, 2010
B. You should use a public or protected base class function.Example: class Base{private: int a;public: Base() {a = 5;} &nbs...
j_l_larson
- Oct 19th, 2009
F. None of the above are entirely the right answerYou can provide a method in the base class to allow the private data to be read or written and then provide an access specifier in the derived class w...
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Default Parameter
What is default parameter? Can a overloaded function have a default parameter?
yzesong
- Jul 29th, 2009
This is my answer, please correct me if I am wrong.Overloading functions with default parameters will cause compile error for ambiguous calling on the overloaded function. But it really depends ...
amarnathsatrawala
- Jun 16th, 2009
The overloads may not always be banned. The compiler could remove the parameter with default values for the overload resolution. e.g. The signature of the fuction after removing the default parameters...
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Unary Postfix Operator Overloading
Which of the following statements accurately describe unary postfix operator++ overloading in C++?A. It can be overloaded with no parameters when the operator function is a class member.B. It can only be overloaded if the operator function is a class member.C. It can be overloaded with one parameter when the operator function is free standing function (not a class member).D. To overload it at least...
preethi
- Sep 14th, 2013
D
ajrobb
- Sep 22nd, 2010
DA. It can be overloaded with no parameters when the operator function is a class member.No. As a class member it must have one dummy parameter:class A { A operator++(int); }; B. It can only be over...
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Function Resolution
Explain the resolution of a function by C ++ complier in the case of function overloading.
sandhya
- Feb 11th, 2014
Mangled names or name mangling
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Private Members
How can we access private members of classs?
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Bottom-Up Approach
Why we follow top down approach in C-language and bottom up approach in C++?Explain in detail.
random viewer
- Jun 11th, 2012
The question is wrong. In most cases, regardless of the language, top down is the better approach. Actually TDD forces this. You must first know what you want, that is, how the client code will use it, before you can design it. Always top down. Just remember that.
Paul_Singh
- Feb 7th, 2012
When designing solution in an object orientated language you start by defining the lowest key players, or entities, and then begin describing how they interact. This is bottom up. In C which is a func...
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Classes
Why should you generally pass an object of the class to a friend function as a reference parameter?Choose one answer. a. if the friend function changes the values of the data member(s) b. if the friend function will not change the values of the data member(s) c. It is more efficient to pass the object by reference. d. A and B e. A and C
ishanaditya
- Sep 1st, 2014
Lets just say you shouldn't seriously consider a company where you get asked this question :)
robertgbjones
- Aug 5th, 2014
Friend-ness and reference vs value parameter semantics are completely disconnected issues. You use refernces if you want changes to the parameter to be visible at the call site, and use copy if not. I...
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What are the different way of creating object in c++ ?
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;What are the key differences between C & C++
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Editorial / Best Answer
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
- 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
- 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...
What is placement new?
sachin_mundhra
- Dec 18th, 2009
Using placement new operator user can allocate memory in a specific memory address. Example: SomeClass at a particular memory address stored in a pointer type variable named pmem new(pmem) SomeClass;
vidhudatta
- Sep 23rd, 2009
Placement syntax allows programmers to explicitly specify memory management of objects. The placement versions of new operator is called placement new.
Can we generate a C++ source code from the binary file?
vladatzar
- Oct 29th, 2010
It is NOT possible!Binary file can be ONLY dissasembled to Assembler Source Code.C# CAN be decompiled and can give proper C# Source code, but this is because C# is more like interpreter and .NET ...
sanjay Maheshwari
- Sep 17th, 2010
It is possible technically, because high level language codes converted into low
level, so there are some ways to converts this low level to high level..For
Example 2 - 0000 0010so it can be converted 0000 0010..There
are some software which are used in private areas.Why array index starts from 0[zero] only?
laxmanmanne
- Jun 23rd, 2010
This boils down to the concept of Binary digits. Take an array size of 64 for example. We start from 0 and end at 63. We require 6 bits.But, if we were to start from 1 and end at 64, we would require 7 bits to store the same number, thus increasing the storage size.
Nisikant
- Jan 30th, 2009
The array is terminated by a NULL character. Hence for array elements the space will be length-1. suppose you have 5 elements in an array. The last position is occupied by NULL character, then space a...
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