#ifdef FOO
int foo;
#else
float foo;
#endif

#if defined BAR
int bar;
#elif defined BAR2
float bar;
#endif

#if 0
int x1;
#elif 1
int x2;
#else
int x3;
#endif

#if 1
int y1;
#elif 0
int y2;
#else
int y3;
#endif

#if 0
int z1;
#elif 0
int z2;
#else
int z3;
#endif


int main()
{
}