/* ---------------------------------------------------------------------
**  Figure 10.7:  Subscript demo: The magnitude of a vector.
** --------------------------------------------------------------------- 
*/
#include "tools.h"

void main( void )
{   
    double vec[3];          /* A vector in 3-space. */
    double magnitude;

    puts( "\n Subscript Demo: The Magnitude of a Vector" );

    printf( " Please enter the 3 components of a vector: " );
    scanf( "%lg%lg%lg", &vec[0], &vec[1], &vec[2] );
   
    magnitude = sqrt( vec[0] * vec[0] + vec[1] * vec[1] + vec[2] * vec[2] );
    printf( "    The magnitude of vector ( %g, %g, %g ) is %g \n", 
                 vec[0], vec[1], vec[2], magnitude ); 
    bye();
}