ref: ba23a153fc2d9eb2dbdb1bc3273b1dcffda81021
dir: /unix.h/
/* this code is uglier than what it should be */
#pragma once
#include <string.h>
#include <stdio.h> /* replace with plan 9's print? */
/* uncomment if your compiler doesn't support it (ANSI, C99)
#define _Noreturn
*/
#define nil NULL
typedef
struct Point
{
int x;
int y;
}Point;
Point Pt(int x, int y);
_Noreturn void sysfatal(char *fmt, ...);
_Noreturn void exits(char *s);
int eqpt(Point p, Point q);
int nrand(int n);