#include <stdio.h>

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

typedef Vertex Polygon;

void svg_start(int w, int h) {
	printf("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
	printf("<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\" width=\"%d\" height=\"%d\">", w, h);
}

void svg_end() {
	printf("</svg>");
}

void svg_line(Vertex* a, Vertex* b) {
	printf("<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" stroke=\"black\" />", a->x, a->y, b->x, b->y);
}

void roads(Polygon* quartier) {
	quartier = quartier;
	Vertex center = { .x=400, .y=300 };
	svg_line(&center, &(quartier[0]));
}

int main() {
	Vertex points[] = {
		{ .x=10, .y=10 },
		{ .x=790, .y=10 },
		{ .x=600, .y=300 },
		{ .x=790, .y=590 },
		{ .x=10, .y=590 },
	};
	int n = 5;
	svg_start(800,600);
	int i;
	for (i = 0; i < n; i++) {
		svg_line(&(points[i]), &(points[(i+1)%n]));
	}
	roads(points);
	svg_end();
	return 0;
}