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Basic structure of a c++ program

Hello friends, in this post today, we will learn about how to write Basic structure of a c++ program. so let's start...


Basic structure of c++ program, structure of c++
Basic structure of c++




Structure of c++:-

The general structure of any C++ program is given below. It simply states that a standard C++. program may look like according to various sections presents in the structure.

Basic structure of c++ program
Structure of c++ program


• The first section Documentation is optional and is used to put comments for the program usually the program heading as we have given.

• In second section we include various header files required by our C++ program.

• Symbolic constants and global variable, functions are defined after that if required.

• The class, main building block of C++ programming is declared which consists of

declaration of data members and functions. The member function may be declared and

defined in the class or they are declared in the class but defined outside the class

which is done outside the class declaration.

• The main() function must be present in every C++ program. It contains all the statements

which are to be executed. Inside this main function we create objects of class created

earlier. All statements are put inside the braces and terminate with semicolon.

The best way to start learning a programming language is by writing a program. Therefore,  here is our first c++ program: 

#include <iostream> /*header file inclusion */
#include <iomanip>
using namespace std;

int x;float y; char z; /* global variables */

void disp(); /* global function */
void show();
/*class declaration starts here */

class demo

{

private :

int x, y;

public :

void input(int a, int b);

void show();

};

/*class declaration ends here */

/*class function definition */

void demo ::input(int a, int b)

{

x=a;

y=b;

}

/*class function definition */

void demo ::show()

{

cout<<"x="<<x<<endl;

cout<<"y="<<y<<endl;

}

int main() /*main function definiton */

{

demo d1,d2; //creating objects

d1.input(10,20);
d1.show();
show(); //local function call
 return 0;
}

/*global function definitions */

void show()

{

cout<<"in show"<<endl;

}

/*Output
x=10
y=20
in show
*/


I hope that whatever information I have given in this post today, you have liked it and you have understood it.so keep learning and wait for the next post that will help you to increase your knowledge with some new information.

Thank you so much for reading. And take care about yourself and your family.


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