Thread: Strings and pointers

  1. #1
    Registered User
    Join Date
    Aug 2009

    Strings and pointers

    Hi guys

    Please take a look at the two lines of code

    char asd[][4]={"qwe", "rty"};

    char *asd[]={"qwe", "rty"};
    When using the first line, I am able to change the values of asd[x][y], while I am not allowed to change the values of the array in the second example. Why is that?

    Last edited by Niels_M; 07-17-2010 at 03:49 PM.

  2. #2
    ATH0 quzah's Avatar
    Join Date
    Oct 2001
    The second one is an array of pointers, which point to string literals. The first is a 2D array of characters, initialized with those values.

    Question 6.2

    Hope is the first step on the road to disappointment.

  3. #3
    Registered User
    Join Date
    Jul 2010
    When a pointer points to a string literal, the string is immutable ( cannot be overwritten ). However when an array is set up with the string literal, it's placed on mutable memory on the stack.

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