First program in C++
Cpp is an Object oriented language (OOpl). It was developed
in 1980 at BELL Laboratories. It is improved version of C language. It provides
the facility of working with objects and classes. It is very powerful language
and is used to develop a variety of program.
Here is the First program with screen shot in Borland C++ .
You can use any Software like Visual Studeo, codeBlock etc and whatever you
like. The main purpose is practice to get success. Rbatec provide you a
platform to learn Cpp.
C++ is close to human langauges that’s why this is called
High Level Language.
#include<Iostream.h>
#inlcude<conio.h>
Int main
{
Cout<<”welcome to c++”<<endl;
Getch ( );
Return 0;
}
First Program in Cpp |
Preprocessor Directive (#)
Instruction given to Compiler before the execution of actual
program. The preprocessor Directive start with hash symbol #.
Include Preprocessor
Include preprocessor directive include header file in cpp
program.
Example #include<iostream>
Header
File
It is the collection of library function to perform
different tasks.
Syntax of Header file
#inlcude<header_file_name>
Example
#include<iostream>
“Iostream” is stands for input output stream.
Main
Function
The main function () is the initial line of CPP Program.
When the program is run, the control enters main() function and start executing
its statements.
Syntax of Main Function
Void main
{
Body of main dunction.
}
Body of
program
In the above first cpp program the body is
(cout<<”welcome to c plus plus”;).
In Double quotes the Line is displayed on screen. You can
display any this on screen like your name .
Example cpp
Cout<<”I m visiting RBatec blog”; etc
In above c++ first program
The first line is preprocessor Directive to include a header
File iostream.h.
The secong line in main function where the execution of
program starts.
Return 0;
Main function should always return 0.its mean Main fuction
() ran fine.
You can run this program in Borlan Cpp by using short
Command ctrl+f9.
Reference Book: Object
Oriented Programming Using C++
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