#include <stdio.h>
#include <math.h>

typedef struct {
	int x;
	int y;
} Point;

double distance(Point, Point);

int main() {
    Point pt1;
	Point pt2;

	pt1.x = 0;
	pt1.y = 0;

	pt2.x = 3;
	pt2.y = 4;

	printf("Distance = %f\n", distance(pt1, pt2));

	return 0;
}

double distance(Point p1, Point p2) {
	return sqrt(pow(p1.x - p2.x, 2.0) + pow(p1.y - p2.y, 2.0));
}