Calculates a hypotenuse by the Pythagorean formula #include <math.h>
double hypot ( double x , double y );
float hypotf ( float x , float y );
long double hypotl ( long double x , long double y );
The hypot( ) functions compute the square root of the sum of the squares of their arguments, while avoiding intermediate overflows. If the result exceeds the function's return type, a range error may occur.
Example
double x, y, h; // Three sides of a triangle
printf( "How many kilometers do you want to go westward? " );
scanf( "%lf", &x );
printf( "And how many southward? " );
scanf( "%lf", &y );
errno = 0;
h = hypot( x, y );
if ( errno )
perror( _ _FILE_ _ );
else
printf( "Then you'll be %4.2lf km from where you started.\n", h );
If the user answers the prompts with 3.33 and 4.44, the program prints this output:
Then you'll be 5.55 km from where you started.
See Also
sqrt( ), cbrt( ), csqrt( )
