I'm honestly not trying to resurrect some gcc 2.96 flame war or anything
here, but I'm not a very seasoned C programmer, and I've run across an
inconsistancy between Red Hat's version of gcc, and gcc 2.95.4 on a Debian
system. Consider the following uninspired, pointless piece of code:
#include <stdio.h>
float toot(int, float);
main() {
int a = 4;
float b = 5;
float result = 0;
result = toot(a, b);
printf("%f\n", result);
}
float toot(int x, float y) {
if (y == 20) {
return y;
} else {
toot(x, x*y);
}
}
Compiled with Red Hat's gcc 2.96, I get "nan" (however, If I take out
the recursive call, and just return x*y, I get 20.000000).
Compiled with Debian's 2.95.4, I get 20.000000.
Can anybody explain to me (a) why, and (b) if there's something inherently
wrong about what I'm doing that would cause this to fail on a Red Hat
system? I know the code is pointless, but it's an extremely dumbed down
version of a more complex problem exhibiting the exact same behavior.
Thanks in advance for any insights that can be provided. Like I said, I'm
not trying to restart an old flame war, or anything -- I'm just a newbie
to C, who is honestly curious about what is going on under the covers to
cause the inconsistency.
--Chris.
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