what is this declaration?

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  • 1230987za@gmail.com
    #1

    what is this declaration?

    Hi,

    I was reading a post about how to learn C programming and someone
    mentioned this, *(int f()) in a struct. It is not in any C code, I
    guess the guy was showing that there are some tricky part in C.

    It does look tricky to me, what does it mean?

    Is the following correct?

    f is a function; the function returns an integer; this integer is de-
    referenced just like a function pointer.

    Can someone show me an example usage of such declaration?
    Tags: None
    • pete
      #2
      Re: what is this declaration?

      1230987za@gmail .com wrote:
      Hi,
      >
      I was reading a post about how to learn C programming and someone
      mentioned this, *(int f()) in a struct. It is not in any C code, I
      guess the guy was showing that there are some tricky part in C.
      >
      It does look tricky to me, what does it mean?
      >
      Is the following correct?
      >
      f is a function; the function returns an integer; this integer is de-
      referenced just like a function pointer.
      >
      Can someone show me an example usage of such declaration?
      It needs more context.
      What you've shown is neither a declaration nor an expression
      nor any other C construct that I'm familiar with.

      --
      pete

        Comment

        • Old Wolf
          #3
          Re: what is this declaration?

          On Jun 22, 4:31 pm, 123098...@gmail .com wrote:
          I was reading a post about how to learn C programming and someone
          mentioned this, *(int f()) in a struct. It is not in any C code, I
          guess the guy was showing that there are some tricky part in C.
          This is not a valid declaration ; perhaps you
          are remembering it wrongly.
          f is a function; the function returns an integer; this integer is de-
          referenced just like a function pointer.
          Integers cannot be dereferenced.

          A function returning int would be:
          int f();
          which cannot occur in a struct definition.

          A pointer to function returning int would be:
          int (*f)();

            Comment

            • rahul
              #4
              Re: what is this declaration?

              On Jun 22, 9:31 am, 123098...@gmail .com wrote:
              Hi,
              >
              I was reading a post about how to learn C programming and someone
              mentioned this, *(int f()) in a struct. It is not in any C code, I
              guess the guy was showing that there are some tricky part in C.
              >
              It does look tricky to me, what does it mean?
              >
              Is the following correct?
              >
              Does not look like it can be correct in any context.
              f is a function; the function returns an integer; this integer is de-
              referenced just like a function pointer.
              That does not make any sense at all.


                Comment

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