Almost all programs are written using the following general structure.

• Document section:

This section consists of a set of comment lines that describe the name of the program, its purpose and other information.

E.g   /*

      This is my first C program

     */

• Link section:

This section contents the instruction for linking the library function with the program. It generally contents #include preprocessor directive.

E.g.  # include  >studio.h>

• Definition section:

This section is used to define the symbolic constants used in the program. It generally contents#define preprocessor directive.

E.g.

#define PI 3.14

• Global Declaration Section:

This section is used for global variable declare and function declare used in the program.

E.g.

int maximum (int,int);

• main() function section:

Every program must contain the function called main()function. The execution of a program is started from the main() function.

E.g.

  voild main()

{

statements;

}

• Sub-program section:

This section is used to define the user-defined function.

E.g.voild test()

{

….

}

• E.g.

/*Document section (program for addition)*/

# include <stdio.h>  /* Link section */

void main()         /*main()function*/

{

int a=10, b=5, c;

c = a + b ;

printf(“addition is =%d”, c);

}