StackOverflow2013

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PO
primarykey
Id
11676721
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
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CreationDate
2012-07-26T19:33:21.573
FavoriteCount
0
LastActivityDate
2012-07-26T19:33:21.573
LastEditDate
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0
OwnerUserId
1555772
ParentId
11654994
PostTypeId
2
Score
1
ViewCount
0
LastEditorDisplayName
text
Body
HOW A SOURCE CODE TRANSLATED TO EXECUTABLE CODE ? We provide Source Code to the compiler and it gives us Executable code .But this is not a single step operation .This follow some predefined steps to convert the Source Code to Executable Code. steps followed for conversion from source code to executable code 1.Preprocessor It is very useful part of the compiler as it does lots of job before translated to machine code. It is a text processor which dose the below text editing operation It removes the comment lines in source code which are written in the Source code for more readability/easy understanding . It add the content of header files to the source code. Header files always contains function prototypes and declarations.(Header files never contain any executable code ) A very important property of Preprocessor is Conditional Compile. It is very required for scalable design. This property also remove the unnecessary burden from compiler. Macros are replaced by this preprocessor. The final output of this stage is known as pure C code. 2.Translator This part of complier is responsible for converting of pure C code to assembly language code. Step by step mapping of C language code to assembly language code done here. The prototypes of the functions and declarations are used by this part for translation of C code. The out put of this stage known as assembly code. 3.Assembler It generate Object code from assembly language code.It converts the assembly language codes to machine language code(i.e in 0's and 1's format).It is not directly run as we take the help of OS to execute our code in processor. The out put of this stage known as object code. 4.Linker It give the final executable code which is going to be run in our machine. The output of this stage is known as executable code. Which is a combination of object code and supporting files. The supporting files may be user defined function definitions ,predefined library function definitions ...etc. 
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1. POhow code is executed and gcc
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1. PTAnswer
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1. USrajesh6115
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