Compile with \-std=c99; link with \-lm.
.SH DESCRIPTION
Floating point numbers can have special values, such as
-infinite or NaN. With the macro
+infinite or NaN.
+With the macro
.BI fpclassify( x )
you can find out what type
.I x
-is. The macro takes any floating-point expression as argument.
+is.
+The macro takes any floating-point expression as argument.
The result is one of the following values:
.TP
FP_NAN