On Tue, 13 Sep 2005, Lars Christian Jensen wrote:
The program below prints "f1 = 4.500000, i = 0x08048484, f2 = 0.000000",
when compiled with c++ (GCC) 4.0.1 20050727 (Red Hat 4.0.1-5).
Sorry, I forgot the options: -O2 -march=i686
This don't looks like un-defined behaviour to me, but the same program
outputs "f1 = 4.500000, i = 0x40900000, f2 = 4.500000", when compiled
with other compilers.
#include <cstdio>
int main() {
float f1 = 4.5;
int i = *((int*)&f1);
float f2 = *((float*)&i);
printf("f1 = %f, i = 0x%08x, f2 = %f\n", f1, i, f2);
return 0;
}
--
Lars Christian Jensen
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