1.DFS

 dfs(x,y)
       標記(x,y
       若(x,y)存在未標記的相鄰位置
            從中隨機選擇一個(nx,ny)
           聯通(x,y)和這個位置
            dfs（nx,ny）

       若(x,y)所有相鄰位置都被標記
           返回

2.遞迴分割

dv(xa,ya,xb,yb)
    /*(xa,ya)為當前區域的左上角， (xb,yb)為當前區域的右下角*/
    如果當前區域太小無法繼續分割
        將這個區域全部打通
        返回
    否則
        在當前區域隨機選擇一個點作為中心
        中心向四邊做垂線，將當前區域分成四個小區域
        在這4
 
個區域的臨邊中隨機選擇3個在隨機位置打通
        繼續分割這四個區域 dv(...)

#include<bits/stdc++.h>
#include<windows.h>

using namespace std;

#define MAX 1000
char mapp[MAX][MAX];
char vis[MAX][MAX];
/* U R D L */
const int xx[] = {0, 1, 0, -1, -1, -1, 1, 1};
const int yy[] = { -1, 0, 1, 0, -1, 1, -1, 1};
const int x2[] = {0
 
, 2, 0, -2, -2, -2, 2, 2};
const int y2[] = { -2, 0, 2, 0, -2, 2, -2, 2};

int W, H;
char WALL = '#';
char PATH = ' ';
int sx, sy, ex, ey;

inline void gotoxy(int x, int y) {
    SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), (COORD) {x, y});
}

void border(char mapp[MAX][MAX], char v) {
    for
 
 (int i = 0; i <= W; i++)
        mapp[0][i] = mapp[H][i] = v;
    for (int i = 0; i <= H; i++)
        mapp[i][0] = mapp[i][W] = v;
}

void fill(char mapp[MAX][MAX], char v) {
    for (int i = 0; i <= H; i++)
        for (int j = 0; j <= W; j++)
            mapp[i][j] = v;
}

void printMap() {
    for (int i = 0; i <= H; i++) {
        for (int j = 0; j <= W; j++) {
            printf("%c", mapp[i][j]);
        }
        puts("");
    }
}



inline bool checkBorder(int x, int y) {
    return x < W && x > 0 && y < H && y > 0;
}

void dfsp(int x, int y) {
    int d, dic = 0;
    vis[y][x] = 1;

    /* go until no new direction */
    for (; dic != (1 << 4) - 1; dic |= 1 << d) {

        /* choose a random direction */
        do d = rand() % 4;
        while (dic & (1 << d));

        if (checkBorder(x + x2[d], y + y2[d]) && !vis[y + y2[d]][x + x2[d]]) {
            /* connect CurrentPosition and NewPosition */
            mapp[y + yy[d]][x + xx[d]] = PATH;
            /* show progress */
            Sleep(20);gotoxy(x+xx[d],y+yy[d]);putchar(PATH);
            dfsp(x + x2[d], y + y2[d]);
        }

    }
}

void dfsMazeCreate(char mapp[MAX][MAX], int w, int h) {
    W = w << 1, H = h << 1;
    srand(time(NULL));
    memset(mapp, 0, sizeof(mapp));
    memset(vis, 0, sizeof(vis));
    border(mapp, WALL);
    fill(mapp, WALL);
    for (int i = 0; i <= H; i++)
        for (int j = 0; j <= W; j++)
            if (i & 1 && j & 1)
                mapp[i][j] = PATH;

    gotoxy(0, 0); printMap();
    dfsp(1, 1);
}

/* Create a random hole on Wall(a,b) */
inline int randomHoleOn(int a, int b) {
    if (a > b) a ^= b ^= a ^= b;
    a++; b--;
    int r;
    do r = rand() % (b - a + 1) + a;
    while (!r & 1);
    return r;
}

void dvp(int ax, int ay, int bx, int by) {

    /*
        if the current area is too small to divide,
        then clear current area.
    */
    if (bx - ax < 3 || by - ay < 3) {
        if (bx - ax < 3) {
            for (int i = ay + 1; i < by; i++)
                mapp[i][ax + 1] = PATH;
        }
        if (by - ay < 3) {
            for (int i = ax + 1; i < bx; i++)
                mapp[ay + 1][i] = PATH;
        }
        return;
    }

    int tmp, cx, cy, a, b;
    /* choose a random dividing center in CurrentArea */
    do {
        cx = rand() % (bx - ax - 1) + ax + 1;
        cy = rand() % (by - ay - 1) + ay + 1;
    } while (cx & 1 || cy & 1);

    /*
        Choose a random Wall between this 4 areas which divided by center.
        And connect other Walls with random postion.
    */
    tmp = rand() % 4 + 10;
    if (tmp != 0) mapp[cy][randomHoleOn(ax, cx)] = PATH;
    if (tmp != 1) mapp[cy][randomHoleOn(cx, bx)] = PATH;
    if (tmp != 2) mapp[randomHoleOn(ay, cy)][cx] = PATH;
    if (tmp != 3) mapp[randomHoleOn(cy, by)][cx] = PATH;

    /* divide the new area */
    dvp(ax, ay, cx, cy);
    dvp(cx, ay, bx, cy);
    dvp(ax, cy, cx, by);
    dvp(cx, cy, bx, by);

}

void dvMazeCreate(char mapp[MAX][MAX], int w, int h) {
    W = w << 1, H = h << 1;
    srand(time(NULL));
    memset(mapp, 0, sizeof(mapp));
    memset(vis, 0, sizeof(vis));
    border(mapp, WALL);
    fill(mapp, WALL);
    for (int i = 0; i <= H; i++)
        for (int j = 0; j <= W; j++)
            if (i & 1 && j & 1)
                mapp[i][j] = PATH;

    dvp(0, 0, W, H);
}

int main(void) {
    system("mode con: cols=120 lines=45");
    int w,h;
    w = 40, h = 10;
    dfsMazeCreate(mapp, w,h);
    gotoxy(0, 0); printMap();
    gotoxy(w*2+2, h*2); puts("Created by DFS.");
    dvMazeCreate(mapp, w,h);
    gotoxy(0, h*2+2); printMap();
    gotoxy(w*2+2, h*4+2); puts("Created by Recursive Partitioning.");
    getchar();
    return 0;
}

效果