pointer initialisation

This is a discussion on pointer initialisation within the C Programming forums, part of the General Programming Boards category; damm this is doing my head in, I know it's probably a simple answer i should know myself but i ...

  1. #1
    Registered User C_Coder's Avatar
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    pointer initialisation

    damm this is doing my head in, I know it's probably a simple answer i should know myself but i cant figure it out

    I want to iniialise a pointer to an array of structures

    this is what i've tried

    Code:
    struct mystruct array[10], *array_ptr;
    
    array_ptr = array; /* this dont work */
    
    array_ptr = &array;  /* or this */
    
    array_ptr = array[0]  /* you guessed it */
    help before its to late and i jump of my roof
    All spelling mistakes, syntatical errors and stupid comments are intentional.

  2. #2
    and the hat of wrongness Salem's Avatar
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    The first should have worked
    Code:
    struct mystruct {
        int a;
    };
    int main ( ) {
        struct mystruct array[10], *array_ptr;
        array_ptr = array; /* this dont work - it does here */
        array_ptr = &array;  /* or this - because it's a pointer to the whole array */
        array_ptr = array[0];  /* you guessed it - this is an element of the array */
        array_ptr = &array[0]; /* but this is a pointer to the first element - So this is OK */
        return 0;
    }
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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  3. #3
    Registered User C_Coder's Avatar
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    Thaks salem the first method works for me now.
    must be my compilers time of the month.
    All spelling mistakes, syntatical errors and stupid comments are intentional.

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