// Sample program from text.     v. 10/23/02
//    from pg. 17.
//
// Program computes the distance between two points.

#include <iostream.h>
#include <stdlib.h>
#include <math.h>

int main()
{
	//  Define and initialize variables.
	double x1=1, y1=5, x2=4, y2=7,
		side_1, side_2, distance;

	// Compute length of sides of right triangle.
	side_1 = x2 - x1;
	side_2 = y2 - y1;
	distance = sqrt( side_1*side_1 + side_2*side_2 );

	// Print distance.
	cout << "The distance between the two points is 
		<< distance << " cm." << endl;

        return 0;

}