I am doing an exercise out of a book which apparently has nested functions.
I read on http://lists.apple.com/archives/xcod.../msg00271.html
that xcode does not support them. The compiler says:
error: nested functions are disabled, use -fnested-functions to re-enable
Where would I put -fnested-functions to reenable so I can complete this exercise?
I ran into that same problem but it seems that I was erroneous in my coding in that I didn't put closing }'s on the main function, i use xcode 3.0
I am closing my braces, does anything look off here?
Code:void playerGetsCard(int *numCards, int cards[52], int playerPoints[2]) { int newCard; newCard = dealCard(numCards, cards); printf("You Draw: "); dispCard(newCard, playerPoints); }
that looks fine, i meant do you have
Code:int main (void){ int i return 0; } void myfunct (void) {....... }
Ohhh, ok gotcha, thanks for that clarification, that compiler won't think its a nested function then correct?
Are you saying that you replace main() with int main(void) { ?
Even with that change the function I am working on does not get fixed, the main function is here and returns no errors or warnings only the function playersGetCard has the nested errors:
Code:main() { int numCards; /* Equals 52 at beginning of each game */ int cards[52], playerPoints[2], dealerPoints[2], total[2]; char ans; /* for users Hit/Stand or Yes/No Response */ do { initCardsScreen(cards, playerPoints, dealerPoints, total, &numCards); dealerGetsCard(&numCards, cards, dealerPoints); printf("\n"); playerGetsCard(&numCards, cards, playerPoints); playerGetsCard(&numCards, cards, playerPoints); do { ans = getAns("Hit or stand (H/S)? "); if (ans == 'H') { playerGetsCard(&numCards, cards, playerPoints); } } while (ans != 'S'); totalIt(playerPoints, total, PLAYER); /* players Total */ do { dealerGetsCard(&numCards, cards, dealerPoints); } while (dealerPoints[ACEHIGH] < 17); /* Dealer Stops */ totalIt(dealerPoints, total, DEALER); /* Dealer's total */ findWinner(total); ans = getAns("\nPlay again (Y/N)? "); } while (ans == 'Y'); return 0; }
Last edited by Bassglider; 12-10-2007 at 12:36 AM.
Horrible code. That is quite an eyesore >_<
Indent that mess.
Also always specify return type, so it should be int main.
I don't think nested functions are legal in the standard... could be wrong, though.
Originally Posted by Adak
Yeah, I know, I'm learning, I copied that straight out of a book so I can type it out and learn what everything is doing.
Do you have any suggested source I can learn flow and tabbing from to make it easier to read?
For every brace {, indent one tab. Then tread over your code and see if you can see additional changes that will make the code more readable to you.
Well any half-decent code editor has auto-indent capabilities.
It may even have an indent code feature.
If you're using some kind of Unix/Linux/BSD clone, there is a popular command line program called 'indent' which also makes a pretty decent job.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
Ok, how does this look now? I know there are different opinions of ways of indenting, but is this easy to read and done correctly?
Code:main() { int numCards; /* Equals 52 at beginning of each game */ int cards[52], playerPoints[2], dealerPoints[2], total[2]; char ans; /* for users Hit/Stand or Yes/No Response */ do { initCardsScreen(cards, playerPoints, dealerPoints, total, &numCards); dealerGetsCard(&numCards, cards, dealerPoints); printf("\n"); playerGetsCard(&numCards, cards, playerPoints); playerGetsCard(&numCards, cards, playerPoints); do { ans = getAns("Hit or stand (H/S)? "); if (ans == 'H') { playerGetsCard(&numCards, cards, playerPoints); } } while (ans != 'S'); totalIt(playerPoints, total, PLAYER); /* players Total */ do { dealerGetsCard(&numCards, cards, dealerPoints); } while (dealerPoints[ACEHIGH] < 17); /* Dealer Stops */ totalIt(dealerPoints, total, DEALER); /* Dealer's total */ findWinner(total); ans = getAns("\nPlay again (Y/N)? "); } while (ans == 'Y'); return 0; }
Right, the "Nested functions" is another name for "functions defined inside other functions", and is a non-standard extension supported by SOME compilers. It really means that you can do something like this:
It's useful when porting from a language such as Pascal that has allows "functions inside functions"Code:int main() { int foo(int x) { return x * x; } printf("foo(4) = %d\n", foo(4)); return 0; }
--
Mats
Compilers can produce warnings - make the compiler programmers happy: Use them!
Please don't PM me for help - and no, I don't do help over instant messengers.
A side note, but main should always return int. And you should also explicity specify a return type for all functions.
Don't type
...instead type...Code:main()
Code:int main()
oh thanks, that fixed the warning
Just move the nested function outside of main (or the function it is defined in) and give it a go.
Todd
