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Where does store memory of initialized string in C?

+1 vote

In the following example

int  main()
  char *ptr ="shakti";

Where does ptr get memory? IN data segment or in stack or code segment ?
Please clarify.

posted May 4, 2014 by Shakti Singh

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2 Answers

+2 votes

"shakti" would store in Code section since it is read only whereas char *ptr stores in stack section since it comes into picture when main () function gets executed.

answer May 5, 2014 by Harshita
OK understood."shakti" would stores in code segment. But now I have another doubt, when ptr would get memory?  Compile time or Run time
0 votes

This is O/S dependent and not the Language dependent. You must executed code in TurboC which is a compiler running on DOS. In turboC we can modify the string since DOS does not have read only memory.
As far as DevC++ or GCC is concerned They run on Windows and Linus/Unix respectively, thus these have read only memory. The O/S has some of the pages marked as read only. These pages (In Paging System) are assigned specifically for storing the objects which have only read access. In page Map table for each virtual page there are bits assigned by which the access permission for the page is determined. Thus it can be said that for storing string literals ( "shakti") there is a different area in memory assigned and can be in any segment except stack segment(If u take the perspective of segmentation system). Actually the string literals have nothing to do with the segment.

answer May 5, 2014 by Prakash
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