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_hypot

Calculates the hypotenuse.

double_hypot(doublex**,doubley);**

Routine Required Header Compatibility
_hypot <math.h> Win 95, Win NT

For additional compatibility information, see Compatibility in the Introduction.

Libraries

LIBC.LIB Single thread static library, retail version
LIBCMT.LIB Multithread static library, retail version
MSVCRT.LIB Import library for MSVCRT.DLL, retail version

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