#include<iostream>
using namespace std;
class Rational
{
int numerator;
int denominator;
public:
int GetNum ()
{
return numerator;
}
int GetDen ()
{
return denominator;
}
void setNum (int numer)
{
numerator = numer;
}
void setDen (int den)
{
denominator = den;
}
int gcd (int i1, int i2)
{
if (i2 == 0)
return i1;
else
return gcd (i2, i1 % i2);
}
public :
Rational (float f)
{
int denom = 1;
while (((int) f - f)!= 0)
{
f *= 10;
denom *= 10;
}
int Gcd = gcd (int (f), denom);
numerator = f / Gcd;
cout <<numerator <<endl;
denominator = denom / Gcd;
cout<<"-----"<<endl;
cout <<denominator <<endl;
}
};
int
main (int argc, char **argv)
{
Rational r1 = Rational (.4537f);
}
-----------------------------------------
This runs successfully with:
g++ without any optimization ,
but with -O or -02 or -03 the executable just hangs forever
On Thu, 2006-02-23 at 10:56 +0100, Jerome Robert wrote:
> Here is the faulty program (this kind of code is generated by
> http://www.swig.org):
>
> /////////// Start ///////////
> #include <stdio.h>
>
> int main(void)
> {
> long long a = 0x77777777L;
> long long b = 0;
> void ** aa=(void **)(void *)&a;
> void ** ab=(void **)(void *)&b;
> *ab = *aa;
> printf("in: %llX, out: %llX\n", a, b);
> return 0;
> }
> /////////// End ///////////
>
> The output for the following version is:
> (Debian 1:3.3.6-12) g++ in: 77777777, out: 77777777
> (Debian 1:3.3.6-12) g++ -O1 in: 77777777, out: 77777777
> (Debian 1:3.3.6-12) g++ -O2 in: 77777777, out: 77777777
> (Debian 4.0.2-9) g++ in: 77777777, out: 77777777
> (Debian 4.0.2-9) g++ -O1 in: 77777777, out: 77777777
> (Debian 4.0.2-9) g++ -O2 in: 77777777, out: 0
>
> So there is something wrong with g++ -O2 (Debian 4.0.2-9). Is this program wrong
> or is this a bug ?
>
> Regards,
>
> Jerome
--
Thanks and Regards
Digvijoy Chatterjee
Please Visit http://indra/LiMS and start your Linux Journey
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