C Language - Important Concepts part -2

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O LEVEL-PAPER 3rD -- M3-R4


C   LANGUAGE 



SOME IMPORTANT CONCEPTS














FOLLWING STEPS TO EXECUTE A PROGRAM--


STEP 1  DOUBLE CLICK ON PROGRAM STORE IN HARD DISK.

STEP 2 AFTER DOUBLE CLICK ON PROGRAM , A XEROX COPY OF PROGRAM FROM HARD DISK COME INTO RAM MEMORY.

STEP 3 NOW RAM SEND EVERY SINGLE INSTRUCTION WRITTEN IN PROGRAM TO PROCESSOR MAIN UNIT.

STEP 4 NOW MAIN UNIT SEND EACH INSTRUCTION TO CONTROL UNIT.

STEP 5 IF INSTRUCTON WRITTEN IN PROGRAM IS ALU TYPE THAN CU SEND TO ALU.

STEP 6 THIS PROCESS REPEATED UNTIL ALL THE INSTRUCTION WRITTEN IN PROGRAM IS NOT EXECUTED . 








FOLLOWING STEPS TO SOFTWARE DEVELOPMENT IN C--



STEP 1  PROGRAM IS WRITTEN IN C LANGUAGE I.E sum.c

STEP 2  NOW COMPILE THE PROGRAM BUT WHILE COMPILER COMPILING 
THE PROGRAM ONE MORE  FUNCTION IS GOING TO PERFORM 
AUTOMATICALLY I.E PREPROCESSOR.

STEP 3 PREPROCESSOR CONVERT THE C LANGUAGE FILE I.E sum.c INTO 
sum.i WITH HELP OF HEADER FILES(In header files, all the codes related 
to program are written).

STEP 4  NOW AFTER  CONVERTING THE FILE INTO sum.i PREPROCESSOR 
SEND TO COMPILER .

STEP 5 NOW COMPILER CONVERT sum.i INTO sum.obj AND SEND 
TO LINKER.

STEP 6 NOW LINKER CONVERT INTO sum.exe FILE(i.e Linker develop the software )
WITH OF LIBRARY FILES 



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