// Simple example of a point struct.
// CSE 374 demo

#include <stdio.h>

// Declaring a new struct of type "struct Point" and
// using typedef to simplify the name to "Point"
typedef struct Point {
  int x;
  int y;
} Point;

// Forward declarations
Point newPoint();
void translateX(Point* p, int deltaX);
void print(Point* p);

int main(int argc, char **argv) {
  Point p = newPoint();
  print(&p);
  translateX(&p, 12);
  print(&p);
}

Point newPoint() {
  Point p;
  p.x = 0;
  p.y = 0;
  return p;
}

void translateX(Point* p, int deltaX) {
  p->x += deltaX;
  // OR
  // (*p).x += deltaX;
}

void print(Point* p) {
  printf("p = (%d, %d)\n", p->x, p->y);
}