?? dragon.c
字號:
/* Bai tap 2_24 -Chuong trinh ve duong Dragons */
#include <conio.h>
#include <graphics.h>
#include <math.h>
/* 1 / sqrt(2) */
#define FCT 0.7071067
/* he so doi tu do sang radian */
#define RADS 0.017453293
#define LEFT 0
#define RIGHT 1
void Dragons(int dir, double len, int n, int leftright)
{
if (n>0)
{
if (leftright==LEFT)
{
dir += 45;
Dragons(dir, len * FCT, n-1, LEFT);
dir -= 90;
Dragons(dir, len * FCT, n-1, RIGHT);
dir += 45;
}
else
{
dir -= 45;
Dragons(dir, len * FCT, n-1, LEFT);
dir += 90;
Dragons(dir, len * FCT, n-1, RIGHT);
dir -= 45;
}
}
else
linerel(len * cos(RADS * dir), len * sin(RADS * dir));
}
void main()
{
int gr_drive = DETECT, gr_mode;
double temp;
initgraph(&gr_drive, &gr_mode, "");
setcolor(YELLOW);
rectangle(0, 0, getmaxx(), getmaxy());
moveto(200,150);
Dragons(0, 300, 16, LEFT);
getch();
closegraph();
}
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