fortran - SELECTED_REAL_KIND in C -

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is there equivalent of selected_real_kind (in fortran) in c language ?

selected_real_kind standard fortran mechanism choosing @ build time real data type meets or exceeds specified parameters numeric representation. in particular, used select data type precision , / or exponent range , / or radix.

standard c not have built-in parameterized facility such designating data types. does have standard macros values describe properties of implementations of standard floating-point types, float, double, , long double. joint radix, precisions in both decimal digits , implementation-radix digits, , minimum , maximum exponent values (also in both decimal , implementation-radix forms) available via these macros. these defined in standard header float.h. (the link posix, formally aligned c standard here.)

it possible use c preprocessor conditionals , these macros define macros or typedefs types meet specific requirements, can use throughout code. not tidy fortran's approach, gets job done.


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