_finite, _finitel
Remonter à float.h - Index
Header File
float.h
Category
Math Routines
Prototype
int _finite(double d);
int _finitel(long double ld);
Description
Determines whether a given double-precision floating point value d is finite.
_finitel is the long double version; it takes a long double argument.
Return Value
Returns non-zero if the argument is finite, and 0 if it is not.
Example
#include <float.h> #include <stdio.h> /* Compare a and b if both have finite values */ int compare(double a, double b) { /* Only if both are finite. Otherwise give an indefinite ordering */ if (_finite(a) && _finite(b)) { if (a < b) return -1; else if (a > b) return 1; else return 0; } else return -1; }
Portability
POSIX | Win32 | ANSI C | ANSI C++ | |
---|---|---|---|---|
_finite |
+ |
|||
_finitel |
+ |