Thread: what is the output of this code

  1. #1
    Registered User
    Join Date
    Jun 2010

    Unhappy what is the output of this code

    Hi all,

    int main()
    	char p[]="hello";
    	return 0;
    the output is 6 and 4

    Can someone explain why is the output of sizeof(p+1)=4

    Regards and Thanks

  2. #2
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    p by itself is an array.

    p+1 is an expression. Arrays in expressions become "a pointer to the first element". So what you end up with is sizeof(char*)
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

  3. #3

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