Best Structure of c language

Best Structure of "C" Program in c language

Structure of "C" Program

Document Section

Link Section

Definition Section

Global Declaration Section

Main() Section

{    Declaration Part }    Executable Part

Sub Program Section    Function 1() --    Function 2()    |    .................        |--> UDF    .................        |    Function n() --

(1) Documentation Section :-

*    The documentation section consist of a set of comment lines in the c program, comments, are the user defined message that are not compiled by compiler.
*    The example of comments the name of program , date, etc. *    There are type types of comments are available in c language.

Single line comment :-

*    We can specify a single line comment by using //symbol.
Ex :-      //This is single line comment

Multi line comment :-

*    We can specify a multi line comment by using /*.......*/.
Ex :-      /* This is multi line commnet
                 Developer Bhautik Jivani
                 Date :- 03-Jul-2018   */

(2) Link Section :-

*    This section provides the instructions to the compiler to link function from the system library.
*    This section includes the header files are stored in the c library. These header files contains the different library functions of c language.
*    The header files must be included in the c program.

Ex :-     #include<stdio.h> (Standard Input Output)
             #include<conio.h> (Console Input Output)

(3) Definition Section :-

*    This section contains all the symbolic constants. Constants means the fixed value for defining a contsant value. We can use # Define Statement.

e.g. :-     #define PI 3.14
*    Here variable PI has fixed value that is 3.14. That does not change during the execution of the program.

(4) Global Declaration Section :-

*    There are some user defined functions and variables are define globally that is in more than one function.
*    Such variables are known as global variables and they are declaredin the global declaration section.

(5) Main() Section :-

*    The c language must have one main function.
*    The main function is a special function used by c language to tell the computer where the program starts.
*    This section contains two parts:

Declaration Part :-

*    It declares the variables that can be used in the executable part.

Executable Part :-

*    It executes the statements. There is at least one executable statement. That main function starts with { & ends with }.

(6) Sub program/Function :-

*    This section contains all the user defined functions. That are called in the main function.

//This is first e.g. to print Bhautik

#include<stdio.h>
#include<conio.h>
void main()
{
    clrscr();
    printf("Bhautik");
    getch();
}