#include <stdlib.h>
#include <stdio.h>

struct Point {
  float x, y;
};

struct AlternativePoint {
  float coords[2];
};

void InitializePoint_Bad(struct Point p) {
  p.x = 1.0;
  p.y = 2.0;
}

void InitializePointArray_Bad(struct Point a[]) {
  struct Point p[] = {{2.0, 6.0}, {3.0, 7.0}};
  a = p;
}

void PrintAlternativePoint(struct AlternativePoint p) {
  printf("ap: {%f,%f} @ %p\n", p.coords[0], p.coords[1], &p.coords);
}

int main(int argc, char **argv) {
  struct Point p = {0.0, 2.0};

  printf("p: {%f,%f}\n", p.x, p.y);
  InitializePoint_Bad(p);
  printf("p: {%f,%f}\n\n", p.x, p.y);

  struct Point a[] = {{1.0, 3.0}, {5.0, 7.0}};
  printf("a[0]:{%f,%f}, a[1]:{%f, %f}\n", a[0].x, a[0].y, a[1].x, a[1].y);
  InitializePointArray_Bad(a);
  printf("a[0]:{%f,%f}, a[1]:{%f, %f}\n\n", a[0].x, a[0].y, a[1].x, a[1].y);

  struct AlternativePoint ap = {{10.0, 100.0}};
  printf("ap: {%f,%f} @ %p\n", ap.coords[0], ap.coords[1], &ap.coords[0]);
  PrintAlternativePoint(ap);

  return EXIT_SUCCESS;
}