C LANGUAGE INTRODUCTION

C LANGUAGE

INTRODUCTION: -

C LANGUAGE DEVELOPS IN AT&T LABORATERY IN AMERICA BY “DENIS

RITCHIE”, YEAR 1972.

         

C CHARACTAR SET:-

                                                CHARACTER’S - A-Z, a-z.

                                                NUMERIC- BETWEEN 0 TO 9 ALL NUMBER’S

                                                SPECIAL SIGN- ~,” @, #, $, %, ^, &, *, (), _, -, +, =,

                                                                   {}, [ ], :, ‘, “”, ?, /.

C CONSTANT:-

1)    PRIMARY CONSTANT                   2) SECONDARY CONSTANT

Ø INTEGER                                           ARRAY

Ø REAL                                                   POINTOR

Ø CHARACTAR                                     STRUCTURE

Ø -                                                             UNION

Ø -                                                             ENUM ETC.

NOTE:-

ü VARIABLE NAME BETWEEN1 TO 8.

ü VARIABLE FIRST LETTER ALWAYS ALPHABATIC.

ü NOT ONLY COMMA (,) ALSO SPACE BETWEEN VARIABLE NAME NOT ALLOWED.

ü EXAMPLE-NAME, S_NO, R_NO.

ü NOT USE 32 KEYWORDS IN VARIBLE NAME.

ü AFTER ANY STATEMENT USE SEMICOLON (;).

HEADER FILES:-

ALWAYS START PROGRAMME WITH THESE HEADER FILES.

                                      #INCLUDE<STDIO.H>

                        #INCLUDE<CONIO.H>

MAIN FUNCTION:-

                   ALL PROGRAM HAVE A FUNCTION WHICH IS

                                      VOID MAIN ()

          OPENING CURLEY BRACE-:

AFTER VOID MAIN YOU TYPE ALL STATEMNT IN OPENING CURLEY BRACE.      {

          DATA TYPE-:

WHAT KIND OF VARIBLE YOUR PROGRAMME REQUIRED THESE ARE

          INT, CHAR, FLOAT.

         

          VARIBLE-:

YOUR PROGRAMME REQUIRED VARIABLE WHICH IS RELATED FROM DATA TYPES.

          CLRSCR ()-:

                             CLEAR LAST RESULT FROM SCREEN.

          INPUT/OUTPUT-:

PRINTF () - IS USE FOR OUTPUT THE RESULT ON SCREEN.

SCANF () – IS USE FOR INPUTTING VALUE, CHARACTAR ETC.

          GETCH ()-:

                             GET ONE BY ONE CHARACTAR FOR PROCESSING.

CLOSING CURLEY BRACE-:

AFTER GETCH PROGRAMME CLOSED BY CLOSING CURLEY BRACE         }