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Calculate the length of the hypotenuse for a right-angled triangle
#include <math.h>
double hypot( double x,
double y );
float hypotf( float x,
float y );
- x, y
- The lengths of the sides that are adjacent to the right angle.
libm
Use the -l m option to
qcc
to link against this library.
These functions compute the length of the hypotenuse for a
right triangle whose sides are x and y adjacent to the
right angle. The calculation is equivalent to:
length = sqrt( x*x + y*y );
The length of the hypotenuse.
|
If an error occurs, these functions return 0, but this is also a valid
mathematical result.
If you want to check for errors, set
errno
to 0, call the function, and then check errno again.
These functions don't change errno if no errors occurred. |
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
int main( void )
{
printf( "%f\n", hypot( 3.0, 4.0 ) );
return EXIT_SUCCESS;
}
produces the output:
5.000000
ANSI,
POSIX 1003.1
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
No |
Thread |
Yes |
sqrt
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