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Editorial Team
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Asked: 2026-06-16T05:53:33+00:00

I was wondering if there is any difference (in terms of syntax and performance)

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I was wondering if there is any difference (in terms of syntax and performance) between a string defined like

char str[200];

and 

char *str;
str = calloc(200, sizeof(char));

Are there differences in terms of usage? (for ex, one is not compatible with strncpy or something) And more importantly, are there differences in terms of performance?

EDIT: I understand that an array defined by char * and calloc can grow and shrink, but should I pick heap memory over stack memory or the other way around for any reason? That’s what I was really trying to ask.

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1 Answer

  1. Editorial Team

    char str[200] allocated in stack memory where as calloc() allocates in heap memory.

    By nature of calloc(), it assigns 0 to all the bytes allocated by it.

    Pls refer the following for stack and heap comparison

    Which is faster: Stack allocation or Heap allocation

    http://www.linuxquestions.org/questions/programming-9/stack-faster-than-heap-685004/

    What and where are the stack and heap?

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