图形公用单元Glib.h

#include <graphics.h>
#include <conio.h>
#include <dos.h>
#include <math.h>
#include <process.h>
#include <stdio.h>
#define PI M_PI
#define END 2011.2
void ginit()
{
  int driver=DETECT,mode,err;
  initgraph(&driver,&mode,"D:\\TC\\BGI");
  /*if (grOK!=(err=graphresult())
  {
    printf("Error: %s\n",grapherrormsg(err);
    exit(1);
  } */
}

void gend()
{
  sound(3500);
  delay(400);
  nosound();
  getch();
  cleardevice();
  closegraph();
}

void set0(int x0,int y0)
{
  setviewport(x0,y0,639,399,0);
}

double LPX=0.0,LPY=0.0;
double ANGLE=0.0,RADIAN=0.0;
void setlp(double lpx,double lpy)
{
  LPX=lpx;  LPY=lpy;
}

void setangle(double angle)
{
  ANGLE=angle;  RADIAN=ANGLE*M_PI/180;
}

void turn(double angle)
{
  ANGLE+=angle;
  ANGLE=ANGLE-(int)ANGLE+(int)ANGLE %360;
  RADIAN=ANGLE*M_PI/180;
}

void warp(double length)
{
  LPX+=length*cos(RADIAN);
  LPY-=length*sin(RADIAN);
}

void move(double length)
{
  double x,y;
  x=LPX+length*cos(RADIAN);
  y=LPY-length*sin(RADIAN);
  line(LPX,LPY,x,y);
  LPX=x;
  LPY=y;
}