Sample of c plus plus program using a class?

Answer 1

#include <iostream>

class foo{}; // Minimal class declaration.

int main()

{

foo a; // Instantiate an object of the class.

foo b(a); // Instantiate a copy of the class.

return(0);

// Both objects fall from scope at this point.

}

Answer 2

header "c.h" class C { private: /* default visibility*/ int field; // hidden from other classes and functions public: /* visible interface */ C(); // default constructor C(const C&) // copy constructor virtual ~C(); // destructor, needs to be virtual to not break destruction process in an inheritance hierarchy int getField() const; // access to private member void setField(int ); }; "c.cpp" /* Initialize field to 0 */ C:C():field(0){} C:C(const C& source):field(source.field){} ~C(){} int getField() const { return field; } void setField(int newVaule){ field = newValue; ) Usage in "main.cpp": #include "c.h" main(){ C object; // default constructor object.setField( 4 ); int i = object.getField(); // i has the value 4; }

Answer 3

A class is a data structure that is used to model real world things. Classes are generally very broad and have two things: member functions and member data. Think of the member functions as the "verbs" of the class and the member data as the "nouns" of the class. The verbs act on the nouns to do something, much how a verb describes what a noun is doing in a sentence.

Now, let's say I have a class called Student. Let's be basic here and say that the class Student has a member function called getGPA() and a member variable called GPA.

An example would look like this:

class Student

{

public:

int getGPA();

int GPA;

};

This class represents a very basic Student. It has a variable called GPA that tells what the Student's GPA is and a function to retrieve that data. In order to access a data member of a class, you need an object. An object is just an instance of a class. Think of it like this. I have a class called Dog. Dog is a class. Now I have an instance of the class Dog called German Shepherd. A German Shepherd is a type of dog but a dog doesn't necessarily have to be a German Shepherd.

You can keep adding more stuff to the class Student to describe it even more, such as a variable called int ID and a function called getID() to define and retrieve the Student's ID number.

Answer 4

#include<iostream>

struct A {

int m_data;

~A() {}

A(const int i): m_data(i) {}

A(const A& a): m_data(a.m_data) {}

A& operator=(const A& a) { m_data=a.m_data; return(*this); }

};

struct B : public A {

~B() {}

B(const int i, const int j): A(i), m_data(j) {}

B(const B& b): A(b), m_data(b.m_data) {}

B& operator=(const B& b) { A::operator=(b); m_data=b.m_data; return(*this); }

};

int main()

{

B b(42, 0);

A a(b);

std::cout<<a.m_data<<std::endl;

}

Output:

42

Answer 5

C Plus Plus (C++) is a programming language.

If you meant to ask about IDEs (Integrated Development Environments - these allow you to code easier, i.e. without having to use terminal or shell), there are many available for use.

Here are a few I've previously used:

• Dev-cpp (bloodshed.net)

• Eclipse C/C++ (there is a Java version of this IDE also)

• Visual Studio 2010 (this I am told, is the industry standard software for games programming in C++)

Answer 6

#include<iostream>

int main()

{

std::cout<<"Hello world!"<<std::endl;

return(0);

}

Answer 7

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