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! this test program is almost the same as
! tests/preprocessor21.f90, except it defines
! value of some of the variables by using `#define`
program preprocessor22
#define VAR1 1
#define VAR2 3
#if (!defined(VAR1) | !defined(VAR2))
print *, "Atleast one of VAR1 and VAR2 isn't defined"
#else
print *, 'Both VAR1 and VAR2 are defined.'
#endif
#define VAR3 4
#if (!defined(VAR3) & !defined(VAR4))
print *, "Neither of VAR3 or VAR4 is defined"
#else
print *, "At least one of VAR3 or VAR4 is defined."
#endif
#define VAR5 6
#if (!defined(VAR5) ^ !defined(VAR6))
print *, "Exactly one of VAR5 or VAR6 is not defined."
#else
print *, "Both VAR5 and VAR6 are defined or neither is defined."
#endif
end program preprocessor22
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