#include<stdio.h>

#define  XMAX 10
#define YMAX 20

struct point
 {
   int x;
   int y;
 };

struct rect
 {
   struct point pt1;
   struct point pt2;
 };

struct point middle;
struct rect screen;

struct point makepoint(int x, int y);
struct point addpoint (struct point p1, struct point p2);
int ptinrect(struct point p, struct rect r);

int main()
{

screen.pt1 = makepoint(0,0);
screen.pt2 = makepoint(XMAX, YMAX);

middle = makepoint ((screen.pt1.x + screen.pt2.x)/2 , (screen.pt1.y + screen.pt2.y)/2);
printf("Middle = %d, %d\n",middle.x, middle.y);

struct point pt3 = makepoint(XMAX, YMAX);
printf("Sum = %d , %d\n", addpoint(middle, pt3));

struct rect r = {{0,0},{30,30}};
printf("Point in rectangle: %s\n", ptinrect(pt3,r) ? "TRUE" : "FALSE");
return 0;
}

struct point makepoint(int x, int y)
 {
   struct point temp;

   temp.x = x;
   temp.y = y;

   return temp;
 }

struct point addpoint(struct point p1, struct point p2)
 {
   p1.x += p2.x;
   p1.y += p2.y;
   return p1;
 }

int ptinrect(struct point p, struct rect r)
{
  return (p.x >= r.pt1.x && p.x < r.pt2.x && p.y >= r.pt1.y && p.y < r.pt2.y);
}