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点击此处下载exe（也需要修改后缀名）
代码：（使用了“ege”头文件）
#include <cstdlib>
#include <cstdio>
#include <cstring>
#include <iostream>
#include <math.h>
#include <time.h>
#include <algorithm>
#include <graphics.h>
//#include <string>
#include <vector>
//#include <map>
//#include <stack>
//#include <list>
//#include <set>

//#define printf(...)

using namespace std;
using namespace ege;

typedef char vsint;
typedef short int sint;
typedef unsigned short int usint;
typedef unsigned int uint;
typedef long int lint;
typedef long long int llint;
typedef unsigned long int ulint;
typedef unsigned long long int uLint;

#define _SIZE_OF_PICTURE_ 1024,525
#define FullPath(path) _fullpath(NULL,path,MAX_PATH)

//#define EveryInVecter(className,vectorName,valueName) vector< ## className ## > ## ::iterator ## valueName ## ; valueName ## < ## vectorName ## ; ## valueName ## ++

//2^n
llint power_2(int n) {
    llint ans;
    for(int i=0; i<n; i++) {
        ans *= 2;
    }
    return ans;
}
template<class T>
class POINT_class {
    public:
    T x, y;
    POINT_class(T __x=0, T __y=0) {
        x = __x;
        y = __y;
    }

    POINT_class operator*(const POINT_class &p) {
        return POINT_class(p.x*x-p.y*y,p.x*y+p.y*x);
    }
    POINT_class operator+(const POINT_class &p) {
        return POINT_class(p.x+x, p.y+y);
    }
    POINT_class operator-(const POINT_class &p) {
        return POINT_class(x-p.x, y-p.y);
    }
    POINT_class operator-() {
        return POINT_class(-x, -y);
    }
    POINT_class operator=(const POINT_class &p) {
        return POINT_class((x=p.x), (y=p.y));
    }
};
typedef POINT_class<float> fPOINT;

#define tPOINT POINT_class<T>
template<typename T>
void line(tPOINT p1, tPOINT p2, PIMAGE img) {
    line((int)p1.x, (int)p1.y, (int)p2.x, (int)p2.y, img);
}
template<typename T>
tPOINT turn(tPOINT p1, bool t) {
    if(t) {
        return tPOINT(-p1.y,p1.x);
    }
    else {
        return tPOINT(p1.y,-p1.x);
    }
}
#undef tPOINT

int main(int argc, char **argv) {
    int n;
    cout << "pless press the size: ";
    cin >> n;
    //存储每一个拐点是左转还是右转
    //
    //true ： 右转
    //false： 左转
    vector<bool> shape;
    shape.push_back(true);

    for(int i=1; i<n; i++) {
        int size = shape.size();
        shape.push_back(true);
        for(int j=0; j<size; j++) {
            shape.push_back(!shape[size-j-1]);
        }
    }

    fPOINT step(512,0), now(256,350);
    for(int i=0; i<n; i++) {
        step = step * fPOINT(0.5,-0.5);
    }
    PIMAGE img = newimage(_SIZE_OF_PICTURE_);
    line(now,now+step,img);
    now = now + step;
    initgraph(_SIZE_OF_PICTURE_+200);
    //putimage(0,0,img);
    uint i = 0;
    bool j = 1;
    for(vector<bool>::iterator iter=shape.begin(); iter<shape.end(); iter++) {
        step = turn(step,*iter);
        line(now,now+step,img);
        now = now + step;
        i++;
        if(i == 100000) {
            j = !j;
            cout << endl << "drawing...";
            if(j)   cout << "...";
            i = 0;
            putimage(0,0,img);
        }
    }
    cout << endl << endl << endl << "done" << endl;

    setcaption(L"按下空格退出");
    putimage(0,0,img);
    
	getch();
    saveimage(img,FullPath("GragonCurve.bpm"));
    savepng  (img,FullPath("GragonCurve.png"));
	closegraph();
	return 0;
}