Returning from a void function

Question

Which is more correct way to return from function   void function          blah some code     OR  void function          blah some code   return        Rationale for second way    It expresses developer intentions more clearly  It helps detecting function end at pre-compile time    Suppose you have such scenario- you have bunch of functions and you must inject some code at the end of those functions  But for some reasons you don t want   or can t modify such huge amount of functions  What can you do about that   Return  amp  macro comes into play  for example    include lt stdio h gt    define MAX LINES 1000  define XCAT a b  a  b  define CAT a b  XCAT a b   define return returns   LINE      1           if  returns   LINE                  printf  End of function on  d line  n    LINE               int CAT tmp   LINE               if   CAT tmp   LINE    returns   LINE     returns   LINE      0  CAT tmp   LINE                     return  static int returns MAX LINES     void function1 void        return     void function2 void        return     int main         function1        function2         return 0

User · Answer

The only reason to have a return in a void function would be to exit early due to some conditional statement:

void foo(int y)
{
    if(y == 0) return;

    // do stuff with y
}

As unwind said: when the code ends, it ends. No need for an explicit return at the end.

User · Answer

Neither is more correct  so take your pick   The empty return  statement is provided to allow a return in a void function from somewhere other than the end  No other reason I believe

User · Answer

The first way is  more correct   what intention could there be to express  If the code ends  it ends  That s pretty clear  in my opinion   I don t understand what could possibly be confusing and need clarification  If there s no looping construct being used  then what  could possibly happen other than that the function stops executing   I would be severly annoyed by such a pointless extra return statement at the end of a void function  since it clearly serves no purpose and just makes me feel the original programmer said  I was confused about this  and now you can be too   which is not very nice

User · Answer

An old question  but I ll answer anyway  The answer to the actual question asked is that the bare return is redundant and should be left out   Furthermore  the suggested value is false for the following reason   if  ret lt 0  return    Redefining a C reserved word as a macro is a bad idea on the face of it  but this particular suggestion is simply unsupportable  both as an argument and as code

[c] Returning from a void function

Examples related to c

Examples related to function

Examples related to void