Re: help with c++ if test

That produces all sorts of problems. jumping to the bottom of a loop is no problem with a goto, and it avoids issues with your exiting variable. it's also quicker, because you just jump to the bottom. otherwise you may break, but it's still going to have to do one more check (two, actually, depending on how the compiler does things) to see if exiting is false.

On 2/9/2011 11:23 AM, Lex wrote:
09.02.2011 20:17, Littlefield, Tyler пишет:
really really highly recommend you avoid goto. This isn't basic, and they're not very useful except for in some odd cases, far and few between. Such as jumping out of two nested loops like so:
int i, j;
for (i = 0; i < 100; i++)
{
for (j = 0; j < 100; j++)
{
if (i+j == 100)
goto botttom;
}
}
bottom:
//do something here

Actually, effect you're trying to achieve is more correctly by the conditional variable (at least in terms of procedural programming):
bool exiting=false;
for (i = 0; i < 100 && !exiting; i++)
{
for (j = 0; j < 100 && !exiting; j++)
{
if (i+j == 100)
exiting=true;
}
}


or may be even
for (j = 0; j < 100; j++)
{
if (i+j == 100)
{
exiting=true;
break;
}
}
}


Lex

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--

Thanks,
Ty

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