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Showing content from https://cplusplus.com/reference/cmath/fmin/ below:

function

fmin

     double fmin  (double x     , double y);      float fminf (float x      , float y);long double fminl (long double x, long double y);

     double fmin (double x     , double y);      float fmin (float x      , float y);long double fmin (long double x, long double y);     double fmin (Type1 x      , Type2 y);       // additional overloads

Minimum value

Returns the smaller of its arguments: either x or y.

If one of the arguments in a NaN, the other is returned.

Header

<tgmath.h>

provides a type-generic macro version of this function.

Additional overloads

are provided in this header (

<cmath>

) for other combinations of

arithmetic types

(

Type1

and

Type2

): These overloads effectively cast its arguments to

double

before calculations, except if at least one of the arguments is of type

long double

(in which case both are casted to

long double

instead).

Parameters

x, y: Values among which the function selects a minimum.

Return Value The minimum numeric value of its arguments.

Example

/* fmin example */
#include <stdio.h>      /* printf */
#include <math.h>       /* fmin */

int main ()
{
  printf ("fmin (100.0, 1.0) = %f\n", fmin(100.0,1.0));
  printf ("fmin (-100.0, 1.0) = %f\n", fmin(-100.0,1.0));
  printf ("fmin (-100.0, -1.0) = %f\n", fmin(-100.0,-1.0));
  return 0;
}

Output:

fmin (100.0, 1.0) = 1.000000
fmin (-100.0, 1.0) = -100.000000
fmin (-100.0,-1.0) = -100.000000