#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include <string.h>

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

static int
_add(int a, int b) {
    return a + b;
}

static double
compute_distance(int x1, int y1, int x2, int y2) {
    int dx = x2 - x1;
    int dy = y2 - y1;
    return _add(dx * dx, dy * dy);
}

MODULE = MyModule  PACKAGE = MyModule

int
add(a, b)
    int a
    int b
  CODE:
    RETVAL = _add(a, b);
  OUTPUT:
    RETVAL