#include <stdio.h>
#include <math.h>
struct punto{
   	float x;
   	float y;
};
float distanza(struct punto a,struct punto b){
	return (float)sqrt((a.x-b.x)*(a.x-b.x)+(a.y-b.y)*(a.y-b.y));
}
int main(){
    	struct punto p,q,p2,p3;
	float a,b;

	a=1.0; b=2.0;

	p.x=0.; p.y=0.;  q.x=a ; q.y=b;
	p2.x=3; p2.y=0;  p3.x=0.; p3.y=0.;

	printf("coordinate punto q=(%3.2f,%3.2f)\n", q.x, q.y);
	p.x=5.; p.y=5.;
	printf("coordinate punto p=%3.2f,%3.2f)\n", p.x, p.y);

	printf("coordinate punto p2=(%3.2f,%3.2f)\n", p2.x, p2.y);
	printf("coordinate punto p3=(%3.2f,%3.2f)\n", p3.x, p3.y);

	printf("distanza tra p e q=%3.2f\n", distanza(p,q));
	printf("distanza tra p2 e p3=%3.2f\n", distanza(p2,p3));

}