Name
isnormal
Synopsis
Tests whether a given floating-point value is normalized
#include <math.h> intisnormal
( floatx
); intisnormal
( doublex
); intisnormal
( long doublex
);
The macro isnormal()
yields
a nonzero value (that is, true
)
if its argument’s value is a normalized floating-point number.
Otherwise, isnormal()
yields 0.
The argument must be a real floating-point type. The rule that
floating-point types are promoted to at least double
precision for mathematical
calculations does not apply here; the argument’s properties are
determined based on its representation in its actual semantic
type.
Example
double maximum( double a, double b ) { if (isnormal
( a ) &&isnormal
( b ) ) // Handle normal case first. return ( a >= b ) ? a : b ; else if ( isnan( a ) || isnan( b ) ) { /* ... */
See Also
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