std::fdim

From Cppreference

Defined in header `<cmath>`

float fdim( float x, float y );		(C++11 feature)

double fdim( double x, double y );		(C++11 feature)

long double fdim( long double x, long double y );		(C++11 feature)

Returns the positive difference between x and y. This could be implemented as fmax (x - y, 0), so if x ≤ y, the result is always equals to 0, otherwise it is x - y.

[edit] Parameters

x, y - floating point value

[edit] Return value

The positive difference value.

[edit] See also

abs(int) labs llabs

computes absolute value of an integral value (

|x|

)
(function)

fmax (C++11)

larger of two floating point values
(function)