fmax, fmaxf, fmaxl
From cppreference.com
Defined in header
<math.h>
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float fmaxf( float x, float y );
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(1) | (since C99) |
double fmax( double x, double y );
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(2) | (since C99) |
long double fmaxl( long double x, long double y );
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(3) | (since C99) |
Defined in header
<tgmath.h>
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#define fmax( x, y )
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(4) | (since C99) |
1-3) Returns the larger of two floating point arguments, treating NaNs as missing data (between a NaN and a numeric value, the numeric value is chosen).
4) Type-generic macro: If any argument has type long double,
fmaxl
is called. Otherwise, if any argument has integer type or has type double, fmax
is called. Otherwise, fmaxf
is called.
Contents |
[edit] Parameters
x, y | - | floating point values |
[edit] Return value
If successful, returns the larger of two floating point values. The value returned is exact and does not depend on any rounding modes.
[edit] Error handling
This function is not subject to any of the error conditions specified in math_errhandling.
If the implementation supports IEEE floating-point arithmetic (IEC 60559),
- If one of the two arguments is NaN, the value of the other argument is returned
- Only if both arguments are NaN, NaN is returned
[edit] Notes
This function is not required to be sensitive to the sign of zero, although some implementations additionally enforce that if one argument is +0 and the other is -0, then +0 is returned.
[edit] Example
Run this code
Output:
fmax(2,1) = 2.000000 fmax(-Inf,0) = 0.000000 fmax(NaN,-1) = -1.000000
[edit] References
- C11 standard (ISO/IEC 9899:2011):
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- 7.12.12.2 The fmax functions (p: 257-258)
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- 7.25 Type-generic math <tgmath.h> (p: 373-375)
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- F.10.9.2 The fmax functions (p: 530)
- C99 standard (ISO/IEC 9899:1999):
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- 7.12.12.2 The fmax functions (p: 238-239)
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- 7.22 Type-generic math <tgmath.h> (p: 335-337)
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- F.9.9.2 The fmax functions (p: 466)
[edit] See also
(C99)
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checks if the first floating-point argument is greater than the second (function) |
(C99)(C99)(C99)
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determines smaller of two floating-point values (function) |
C++ documentation for fmax
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