distance.c

/*	distance.c

	Compute Euclidian distances

	by: Steven Skiena
*/

/*
Copyright 2003 by Steven S. Skiena; all rights reserved. 

Permission is granted for use in non-commerical applications
provided this copyright notice remains intact and unchanged.

This program appears in my book:

"Programming Challenges: The Programming Contest Training Manual"
by Steven Skiena and Miguel Revilla, Springer-Verlag, New York 2003.

See our website www.programming-challenges.com for additional information.

This book can be ordered from Amazon.com at

http://www.amazon.com/exec/obidos/ASIN/0387001638/thealgorithmrepo/

*/

#include <stdio.h>

#include "distance.h"

double distance(point a, point b) {
    int i;
    double d = 0.0;

    for (i = 0; i < DIMENSION; i++) {
        d = d + (a[i] - b[i]) * (a[i] - b[i]);
    }

    return(sqrt(d));
}

int main(void) {
    point a = {6, 2, 3};
    point b = {6, 3, 4};

    printf("distance = %f\n", distance(a, b));

    return 0;
}