hypot

hypot

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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( )