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C++ Language

C++ Language

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Nasar 22 Apr in  C++ Language classes

What is prototype in c++ and c?

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Malika replied | 26 May

Prototype explains the structure of the functions we are going to use in C,C++ programs or you can say it's a functional declaration.

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Malika replied | 27 May

Prototype explains the structure of the function that we are going to use in C, C++.Or you can say its a function declaration.

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Vijay 22 Apr in  C++ Language classes

What is class? What is object? Describe these 2 with example.

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Anshul replied | 23 Apr

Class is the collection of dataset and data members where as the object is the real time entity

example :-
public class classname
{
//datamembers

//member functions

}


object:-

classname objectname;

the datamembers and member function of the class can be public,private and protected.
We can...  more»
Class is the collection of dataset and data members where as the object is the real time entity

example :-
public class classname
{
//datamembers

//member functions

}


object:-

classname objectname;

the datamembers and member function of the class can be public,private and protected.
We can call the class using classname.objectname «less

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A

Arun replied | 24 Apr

A Class is a template/blue print defined by the user (programmer). It provides space to hold all the details and also defines the behaviour of the class. An object is an instance created for that class and it contains the details and behaviour coded in the class.
Say you have defined a class Player - It contains a Name, Health and Lives. It can move, Jump and Shoot.
Here...  more»
A Class is a template/blue print defined by the user (programmer). It provides space to hold all the details and also defines the behaviour of the class. An object is an instance created for that class and it contains the details and behaviour coded in the class.
Say you have defined a class Player - It contains a Name, Health and Lives. It can move, Jump and Shoot.
Here , in the player class - Name, Health and Lives are data and move, jump, shoot are behaviour.

Now using the class player if you create an object X. X will be created with the data and behaviour. So that it behaves like a player.

Hope you understand «less

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Y

Yusufali 22 Apr in  C++ Language classes

In c++ have a default constructor?

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Shibaji replied | 15 May

If you do not define a constructor, the compiler will define a default constructor for you.

The implementation of this

default constructor is:
default construct the base class (if the base class does not have a default constructor, this is a compilation failure)
default construct each member variable in the order of declaration. (If a member does...  more»
If you do not define a constructor, the compiler will define a default constructor for you.

The implementation of this

default constructor is:
default construct the base class (if the base class does not have a default constructor, this is a compilation failure)
default construct each member variable in the order of declaration. (If a member does not have a default constructor, this is a compilation failure).
Note:
The POD data (int,float,pointer, etc.) do not have an explicit constructor but the default action is to do nothing (in the vane of C++ philosophy; we do not want to pay for something unless we explicitly ask for it).

If no destructor/copy Constructor/Assignment operator is defined the compiler builds one of those for you (so a class always has a destructor/Copy Constructor/Assignment Operator (unless you cheat and explicitly declare one but don't define it)).
The default implementation is:

Destructor:
If user-defined destructor is defined, execute the code provided.
Call the destructor of each member in reverse order of declaration
Call the destructor of the base class.
Copy Constructor:
Call the Base class Copy Constructor.
Call the copy constructor for each member variable in the order of declaration.
Assignment Operator:
Call the base class assignment operator
Call the assignment operator of each member variable in the order of declaration.
Return a reference to this.
Note Copy Construction/Assignment operator of POD Data is just copying the data (Hence the shallow copy problem associated with RAW pointers). «less

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Manjay Kumar replied | 26 May

yes, with no parameters

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M

Muskaan 22 Apr in  C++ Language classes

Difference between "C structure" and "C++ structure".

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Sunil replied | 31 May

In C++, Struct works just like Classes with Public visibility (i.e, you can declare methods/functions within struct). Whereas in C, you cannot declare methods inside struct. C structures are used only for grouping data.

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Ganesa replied | 31 May

no difference in structure declaration in c and c++

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Ritesh 22 Apr in  C Language Classes, C++ Language classes

How does void* differ in c and c++?

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S

Shashiraja replied | 13 Jun

Behaviour wise there is no difference however there is difference when we try using that in source code.
The basic difference is that typecasting TO and FROM void* is implicit in C. However in C++ typecast TO void* is implicit however typecast FROM void* needs to be done explicitly

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Sujeet 21 Apr in  C++ Language classes

What is the difference between class and structure?

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Anshul replied | 21 Apr

A structure is a value type so it is stored on the stack, but a class is a reference type and is stored on the heap. A structure doesn't support inheritance, and polymorphism, but a class supports both. By default, all the struct members are public but class members are by default private in nature.

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Varun replied | 21 Apr

Apart from the syntactical difference the only difference (in C++) between a class and structure is that classes have 'private' while structures have 'public' as their default access modifiers. This brings in a lot of logical differences between the two data types.

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V

Vikram 21 Apr in  C++ Language classes

What is Difference between c and c++?

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Varun replied | 21 Apr

1) C is a structural or procedural programming language whereas C++ is an object oriented programming language.
2) Functions are the fundamental building blocks whereas Objects are the fundamental building blocks.
3) Variables must be defined at the beginning in the function whereas Variables can be defined anywhere in the function.
4) Programs are divided into modules...  more»
1) C is a structural or procedural programming language whereas C++ is an object oriented programming language.
2) Functions are the fundamental building blocks whereas Objects are the fundamental building blocks.
3) Variables must be defined at the beginning in the function whereas Variables can be defined anywhere in the function.
4) Programs are divided into modules and functions whereas Programs are divided into classes and functions.
5) C doesn’t support exception handling directly. Can be done by using some other functions whereas C++ supports exception handling. Done by using try and catch block. «less

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Meganadha replied | 17 Jun

C Language is Structured Programming Language where as C++ is Object Oriented Programming Language

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D

Deepak 21 Apr in  C++ Language classes

What are the different types of Storage classes?

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Learnbay replied | 31 May

Type of storage class:1. Auto 2. Static
3. Register
4.Extern

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Ganesa replied | 31 May

static, register, auto, extern are the four storage classes in c and c++

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S

Sureka 18 Apr in  C++ Language classes, Advanced C++(C++ Language classes)

what are uses of c++ programs ?

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Aman 09 Apr in  C++ Language classes, Advanced C++(C++ Language classes)

how the virtual is work internally in inharitance in c++

3 3

Shourjya replied | 13 Apr

Hi Please read v_table, you will understand.

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S

Sameer 28 Mar in  IT Courses, C++ Language classes, Java Certification Classes

How long does it take (in weeks or months) to learn fundamental subjects of IT. I'm a MBBS graduate. I'm currently in USA & interested in online coaching. I Want to Study MASTERS IN HEALTH IT (HEALTH INFORMATICS). SO BEFORE STARTING MY MASTERS STUDY, I WANT TO CLEAR MY FUNDAMENTS ABOUT INFORMATION TECHNOLOGY SUBJECTS AS I'VE NO KNOWLEDGE AT ALL ABOUT...  more»
How long does it take (in weeks or months) to learn fundamental subjects of IT. I'm a MBBS graduate.
I'm currently in USA & interested in online coaching.
I Want to Study MASTERS IN HEALTH IT (HEALTH INFORMATICS).
SO BEFORE STARTING MY MASTERS STUDY, I WANT TO CLEAR MY FUNDAMENTS ABOUT INFORMATION TECHNOLOGY SUBJECTS AS I'VE NO KNOWLEDGE AT ALL ABOUT ALL THESE IT SUBJECTS.
I read somewhere that for IT, 3 subjects are fundamental:JAVA, C++, & C. I'M NOT SURE THOUGH.
My probable future subjects are:
IT 510 Requirements Analysis
IT 515 Decision Making for IT or MSC 515 Research Methods
IT 520 Enterprise Infrastructure and Networks
IT 530 Computer Security
IT 540 Enterprise Data Management and Analysis
IT 550 Ethics, Law, and Policy in the Information Age
IT 610 IT Governance and Strategy
IT 680 IT Master’s Project «less

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Rohit replied | 29 Mar

Hi Sameer,

We give training in various fields as part of TL-LABS.
Please contact us for more details.

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Karthika replied | 04 Apr

Hi Sameer,

If you want to understand the fundamentals of IT, its basically depends on how much time you wish to spent on it and how much your dedicated to that subjects. In general to understands the basic and fundamental concepts of Java/C++ programming languages minimum you required 1 month if you wish to take a class from 1to 2 hours daily, based on your availability.
Please...  more»
Hi Sameer,

If you want to understand the fundamentals of IT, its basically depends on how much time you wish to spent on it and how much your dedicated to that subjects. In general to understands the basic and fundamental concepts of Java/C++ programming languages minimum you required 1 month if you wish to take a class from 1to 2 hours daily, based on your availability.
Please contact me if you required more details.

All the best...... «less

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S

Suresh 15 Mar in  C++ Language classes

can you explain of parse programe in c++ using pointer?

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Yashwanth 14 Mar in  C++ Language classes, Advanced C++(C++ Language classes)

what are the benifts of c++

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Rahul replied | 21 Mar

C++ is the basic language to understand any programming language.

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S

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Amitava replied | 17 May

Yeah easily you can enter in IT field.Its depends upon your interest and passion.Don't think your from No IT background.You must be positive in your thoughts and in your actions.if you are interested in programming field yeah just start from C language.Also follow Balaguruswamy for basic.

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Swapnil replied | 07 Jun

Business Analytic is best match for your profile and where you want to go. Check the job profiles, industry and skills require and go ahead. All the best.

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Sunita 19/12/2015 in  C++ Language classes

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Vibhu replied | 10 Mar

It gives a java style of easier coding, whrein, data can be passed by reference without using complexity of pointer. But so many features still mandate the use of pointers in real life, like *this.

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Ravi Kumar replied | 22 Mar

Depending on the requirement, If user want to change the value of a variable without creating another variable, one can use reference variable.

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H

Hiteshwar 08/12/2015 in  C++ Language classes

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Krishn replied | 25/12/2015

Copy constructor is especial member function of the class if user does not declare it into the class then compiler will provide it to the user.
Copy constructor creates the new object from the already existed object of same class.
Suppose you have a class A then the copy constructor will look like A(const A& obj).
Copy constructor will be called only three situations:...  more»
Copy constructor is especial member function of the class if user does not declare it into the class then compiler will provide it to the user.
Copy constructor creates the new object from the already existed object of same class.
Suppose you have a class A then the copy constructor will look like A(const A& obj).
Copy constructor will be called only three situations: call by value, return by value and explicitly called. «less

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Vibhu replied | 10 Mar

Its a constructor that is invoked when a new object is formed using a copy of existing object.
Happens in scenarios like, return an object by value, pass an object by value, passing an object into new().
Writing the syntax, is resulting in an error. But you get the point, right ?

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Sunil 28/11/2015 in  C++ Language classes

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Rajamohan replied | 09/12/2015

:: this is scope resolution operator it is used access the outside of the class access the function

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Vanitha.m replied | 21/12/2015

To define the function outside the class and also to use the variable globally

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S

S 07/11/2015 in  C++ Language classes

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N

Neeraj replied | 08/12/2015

It's an alternative to define constants

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Algorithm replied | 09/12/2015

is a data type consisting of a set of named values called elements, members or enumerators of the type.

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S

S 06/11/2015 in  C++ Language classes

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Rajamohan replied | 09/12/2015

An inline function is one for which the compiler copies the code from the function definition directly into the code of the calling function rather than creating a separate set of instructions in memory. Instead of transferring control to and from the function code segment, a modified copy of the function body may be substituted directly for the function call. In this way, the performance...  more»
An inline function is one for which the compiler copies the code from the function definition directly into the code of the calling function rather than creating a separate set of instructions in memory. Instead of transferring control to and from the function code segment, a modified copy of the function body may be substituted directly for the function call. In this way, the performance overhead of a function call is avoided.

A function is declared inline by using the inline function specifier or by defining a member function within a class or structure definition. The inline specifier is only a suggestion to the compiler that an inline expansion can be performed; the compiler is free to ignore the suggestion.

The following code fragment shows an inline function definition.

inline int add(int i, int j) { return i + j; }

The use of the inline specifier does not change the meaning of the function. However, the inline expansion of a function may not preserve the order of evaluation of the actual arguments. Inline expansion also does not change the linkage of a function: the linkage is external by default. «less

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Unais Kamle replied | 17 Jun

An enumeration or enum is a user-defined type whose value is restricted to one of several explicitly named constants(enumerators). Enumeration are defined using keyword: enum.

Example:
enum months { jan, feb, mar }

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Monisha 16/09/2015 in  C++ Language classes

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Ansari replied | 04 May

It is a header file which is located in c++ installation direction. It has the code for input and output stream like cout and cin. like .txt, .mp3, .flv " .h " also a file extension. hope you got the answer

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Unais Kamle replied | 17 Jun

iostream.h is the standard input/output header file for C programming. It includes definitions of the input/output functions used (example, definitions of "printf", "scanf" functions, etc.)

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Sunita 10/09/2015 in  C++ Language classes

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Nand Kishore replied | 09/12/2015

You will be able to comprehend the beauty of computer world and use it for yourself. C++ is philosophical if you understand its core concepts that relate beautifully to the real world.

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Ashoka replied | 12/12/2015

You can build software for all platforms, from backend to desktop to mobile. There's no single place where C++ doesn't work.

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Rajamohan replied | 09/12/2015

One of the most important characteristics of procedural programming is that it relies on procedures that operate on data - these are two separate concepts. In object-oriented programming, these two concepts are bundled into objects. This makes it possible to create more complicated behavior with less code.

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Ganesa replied | 13 May

programming means the way you have to follow. procedure means the code you get as a result of programming.

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Harikrishnan 29/08/2015 in  C++ Language classes

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Heba replied | 27 Apr

A loop within a loop is a nested loop.
For example:
for(i=1; i<=5;i++)
{
for(j=1;j<=i;j++)
{
cout< }
}

Here, we have a for loop within another for loop. This is nested loop

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Unais Kamle replied | 17 Jun

A loop within a loop is called a nested loop.
For example:

for(int a=0; a<10; a++)
{

for(int b=10; b{
//do something here
}
}

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Moinuddin 14/08/2015 in  C++ Language classes

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Arpita replied | 25/11/2015

C++ is an OOP(Object oriented programming) language which allows data abstraction, encapsulation, inheritance, polymorphism and many more other properties of OOP.

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Rajamohan replied | 09/12/2015

C++ is an OOP(Object oriented programming) language - See more at: http://www.urbanpro.com/c-language-questions/2402972#sthash.a7taaT7O.dpuf

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Rajamohan replied | 09/12/2015

SCI Studio,Crystal Space free 3D Engine,PLIB Portable Games Library,Doom 3 source code

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Umasankar replied | 09/12/2015

you can use Visual C++ ( Licensed version), wxWidget (free and open source)

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