Re: return types with conditional

>Suppose the program is:
>main() { fn1(); if (debug == 0) fn2();}
>where fn2() returns int and fn1() returns int*. 

You are not using either the return value of fn1() nor the return value
of fn2().

>Since main is implicitly
>being declared as returning int, is there a possible problem here? 

Yes, you are failing to return anything from main().  If this is
C99 code, main() defaults to returning 0, but I think not making
it explicit is poor style.  If this is C89 code, you return undefined
garbage from main().

>If
>debug does equal 0, then the last thing to execute is fn2, which returns
>the expected int. 

What fn2() returns has nothing whatever to do with what main()
returns.  And get your expecter fixed:  you expect incorrectly if
you think this has anything to do with what main() returns.

>If debug does not equal 0, then the last thing to execute
>is fn1() which returns an unexpected int*.

What fn1() returns has nothing whatever to do with what main()
returns.
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