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Topic: function return and for()? (Read 264 times) |
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lunetta
 
 
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function return and for()?
« on: May 2nd, 2004, 2:18am » |
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The most-boring-member-of-all-forum strikes again with another syntax question...
regarding to functions with return() statements and for() -
int test(){
int ret;
for(int i=0;i<10;i++){
// check something here
// after checking, I find a value: 5
ret = 5;
}
return (ret);
}
void setup(){
}
void draw(){
}
why this doesn't work? ?
if I declare any initial value to ret, everything works fine. Is there a conceptual reason why it works like this? functions need a "safe value" return, despite of the fact that the return value anyway will be assigned anyway?
again, this is not a problem I'm running into, but an "ideological doubt", so I'm sorry for bothering the board with these details...
Thanks for all!!
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| « Last Edit: May 2nd, 2004, 2:30am by lunetta » |
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arielm
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Re: function return and for()?
« Reply #1 on: May 2nd, 2004, 2:34am » |
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no you're not a programming abomination, your just pointing at one of the subtleties/headache-makers of java 
for your code to work, assigning a dummy value to "ret" should be enough, e.g:
Code:
otherwise, a friendly compiler like eclipse will tell you "the local variable ret may not have been initialized"...
(btw, you don't need to put parenthesis when returning a value)
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Ariel Malka | www.chronotext.org
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lunetta
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Re: function return and for()?
« Reply #2 on: May 2nd, 2004, 3:23am » |
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Thanks again Ariel-Tylenol; this headache is gone
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DW Tebriel
Guest
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Re: function return and for()?
« Reply #3 on: May 6th, 2004, 10:59pm » |
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The only reason why you need to assign a value to ret at the beginning is that the compiler doesn't like it if there is potential for returning a null variable at the end. If the conditions allow for a possibility of not assigning a number in ret, then ret would return null and "crash." In these cases I usually assign -1 as the initial value. Just something to think about in future methods. 
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