Structure of a Basic C++ Program [C++ Tutorials – 3]

Here I am sharing you the most Basic C Plus Plus Program Structure.

C++ program consists one or more functions. A function called main() is must in a C++ program which cannot be used more than one time in a program.

The execution of any C++ program start at main() and ends within main(). The calling of other functions is done within the main() function.

Structure of a C++ program

#include<header file>
void main()
{ 
statements;
}

The C++ program starts with header files. Header files are the C++ library files which include some functions required in the program can be obtained.

The function definition starts with the opening brace { and end with the closing brace }. The statements of a program are written inside the { and } o the main function.

Each statement in C++ is eliminated by a semi-colon ( ; ).

C++ supports the writing of comments inside the program. Any single line comment can be expressed by adding a double slash before the comment.

Example

//C++ is an OOP language.

Multiline comments begin with /* and end with */.

Sample C++ Program Using Comments

#include<iostream.h>
void main()
{
//This is a sample program
cout<<"C++ is a superset of C";
/*The above cod will print 'C++ is a superset of C'  in the output window.
The statement 'cout<<' is used to print in C++ program.*/
}

The output of the above program code will be as shown below.

C++ is a superset of C