_hypot

Calculates the hypotenuse.

double_hypot(doublex**,doubley);**

For additional compatibility information, see Compatibility in the Introduction.

Libraries

Return Value

_hypot returns the length of the hypotenuse if successful or INF (infinity) on overflow. The errno variable is set to ERANGE on overflow. You can modify error handling with _matherr.

Parameters

x, y

Floating-point values

Remarks

The _hypot function calculates the length of the hypotenuse of a right triangle, given the length of the two sides x and y. A call to _hypot is equivalent to the square root of x² + y².

Example

/* HYPOT.C: This program prints the
 * hypotenuse of a right  triangle.
 */

#include <math.h>
#include <stdio.h>

void main( void )
{
   double x = 3.0, y = 4.0;

   printf( "If a right triangle has sides %2.1f and %2.1f, "
           "its hypotenuse is %2.1f\n", x, y, _hypot( x, y ) );
}

Output

If a right triangle has sides 3.0 and 4.0, its hypotenuse is 5.0

Floating-Point Support Routines

See Also   _cabs, _matherr