Introduction to C++ Programming Language

 

•Introduction:

A program is a sequence of institutions that can be executed by a computer.

Every program is written in some programming language. C++ is one of the most powerful programming language available.

To write and run C++ programs, you need to have a text editor, and a C++ compiler installed in your computer.

  ✓Text Editor

A text editor is a software system that allows you to create and edit text files on your computer. Programmers uses text editor to write a programming language such as C++.

      ✓Compiler

A Compiler is a software system that translates programs into the machine's language, i.e., Binary Code, that the computer's operating system can run them, that translation process is called the compiling the program.

      ✓Basic Steps to solve program on a computer

1. Read the program carefully, and decide what are inputs and outputs.

2. Write the instructions by using one of programming language like C++. This coded set of instructions is called Source Program. You need a text editor for this.

3. Save this file with extension .cpp on your computer.

4. Compile and run the program with test data.

5. After running the program, you get output.

     ✓Basic Terminology

1. First line is known as Comment. Declaration of the comment stat in C++ starts with the symbol //. Any statements within comments are not executable, they are ignored by the compiler.

2. In the Second line, #include is a preprocessor direction. It is not a part of our program, it is an instructions to the compiler to include the contents of the files 'iostream.h’. input and output stream (iostream.h) contains a set of functions for handling input and output operations in C++ . Normally we use 'cin' for input and 'cout' for output.

3. Third line 'void main()' is also required in every C++ program. It tells where the program begins.

4. Next one line is the actual body of the program. A program body is a sequence of statements enclosed in brackets {      }.

The C++ language is case-sensitive. main() is different from Main().

     ✓Sample Program

    ✓Some shortcuts 

1. Alt+Enter Key:

       To make big screen or small screen as per                  requirement.

2. F10 key:

        If curser struck then to select Menus.

3. Alt+X key:

        It gives you a black screen.

4. Cin.get();  :

       To get immediate output

5. Clrscr();    :

         To clear the output screen. Need to add                       #include<conio.h> in program.

This is all for today.

In detail, We will see in the next post.

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