LEARNINGS OF THE WEEK (TAGARO)

STRUCTURE OF A SIMPLE C PROGRAM
BY: Sharra Mae S. Tagaro IV- Rizal

This week, we discussed more about C language- specifically its structure.

Structure of a simple C program

#include

#define directive

main()

{

variable declaration section;

______________________

______________________

}

• n#include directive – contains information needed by the program to ensure the correct operation of C’s Standard library functions.

• n#define directive – used to shorten the keywords in the program.

• nVariable declaration section – it is the place where you declare your
  

variables.

• nBody of the program – start by typing main() and the { and }. All statements

should be written inside the braces.

Commonly used include files in C language.

• nalloc.h – declares memory management functions.

• nconio.h – declares various functions used in calling IBM-PC ROM BIOS.

• nctype.h – contains information used by the calssification and character convertion macros.

• nmath.h – declares prototype for the math functions.

• nstdio.h – defines types and macros needed for standard I/O.
• nstring.h – declares several string manipulation and memory manipulation routines.

Important Symbols

• n\n – is a line char used to move the cursor to the next line

• n‘ ‘ – single quote is used for single character / letter.

• n“ “ – double quote is used for two or more character

• n{ - open curly brace signifies begin

• n} – close curly brace signifies end

• n& - address of operator

• n* - indirection operator / pointer