/*

* dist.c

* This program read two points and computes the distance between them.

*/

#include <stdio.h>

#include <math.h>

int main ()

{

double x1, y1; /* The coordinates of the first point. */

double x2, y2; /* The coordinates of the second point. */

double dist;

/* Read the two points. */

printf ("Please enter the first point: ");

scanf ("%lf %lf", &x1, &y1);

printf ("Please enter the second point: ");

scanf ("%lf %lf", &x2, &y2);

/* Compute the distance between these points:

* ________________________

* / 2 2

* dist = \/ (x2 - x1) + (y2 - y1)

*/

dist = sqrt ((x2 - x1)*(x2 - x1) + (y2 - y1)*(y2 - y1));

printf ("dist((%g,%g),(%g,%g)) = %g\n", x1, y1, x2, y2, dist);

return (0);

}