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pointers

This is a discussion on pointers within the C Programming forums, part of the General Programming Boards category; Given the following declarations int i =3, j, *iptr; the following statement is intended to assign value of i to ...

  1. #1
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    pointers

    Given the following declarations int i =3, j, *iptr;
    the following statement is intended to assign value of i to j
    j = *iptr;
    however this will not work unless preceded by another statment.
    write the required preceding statement.

  2. #2
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    Follow this link, read, and do your own homework.
    dennis.cpp likes this.
    Right 98% of the time, and don't care about the other 3%.

  3. #3
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    Quote Originally Posted by Mr.who View Post
    Given the following declarations int i =3, j, *iptr;
    the following statement is intended to assign value of i to j
    j = *iptr;
    however this will not work unless preceded by another statment.
    write the required preceding statement.
    int i = 3 That's perfectly clear
    int j; value of j is uninitialized, could be any whole number atm

    int *iptr; same as j, it has not been given an address yet, could be any address.

    iptr is an address, so what is *iptr? It's the value of what is at that address.

    Which of course, the address of i is what you need. Wouldn't it be handy if we had an address of operator in C?

    Oh, we do!
    dennis.cpp likes this.

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