使用C++生成扫雷地图（仅生成于二维列表内），为什么最左、最右两列没有被生成？

Question

Pygame编写扫雷游戏，我使用了C++来生成地图，并储存在了Message.txt文件里，可左右两侧并没有被生成，除了表示雷的x外，全是0，求各位帮助一下

Python:

import sys
import pygame
from pygame.locals import *
import Game#我自己编写的一个文件，不用管

mapsize = ((9,9),(16,16),(30,16))
#Screen size is map_size times 40.
bombsNum = (10,40,99)
name = Game.Login()
difficulty = Game.ChooseDifficulty(sys)#"Easy" is 0, "Normal" is 1, "Hard" is 2
fout = open("Message.txt","w")
fout.write(str(difficulty) + "\n")
fout.write(str(mapsize[difficulty][1]) + " " + str(mapsize[difficulty][0]) + "\n")
fout.write(str(bombsNum[difficulty]))
fout.close()

C++:

#include <cstdio>
#include <fstream>
#include <cstdlib>
#include <cstring>
#include <ctime>
using namespace std;

int difficulty;
char map[25][31];
int height, width;
int bombsPos[200], bombsNum;
int main()
{
    memset(map, '0', sizeof(map));
    ifstream fin("Message.txt");
    fin >> difficulty >> height >> width >> bombsNum;
    fin.close();
    srand((unsigned int)time(NULL));
    for (int i = 0; i < bombsNum; i++)
        map[(rand() % height) + 1][(1 + rand() % width) + 1] = 'x';
    for (int i = 2; i <= height - 1; i++)
    {
        for (int j = 2; j <= width - 1; j++)
        {
            if (map[i][j] != 'x')
            {
                if (map[i + 1][j] == 'x')
                    map[i][j]++;
                if (map[i + 1][j + 1] == 'x')
                    map[i][j]++;
                if (map[i][j + 1] == 'x')
                    map[i][j]++;
                if (map[i - 1][j + 1] == 'x')
                    map[i][j]++;
                if (map[i - 1][j] == 'x')
                    map[i][j]++;
                if (map[i - 1][j - 1] == 'x')
                    map[i][j]++;
                if (map[i][j - 1] == 'x')
                    map[i][j]++;
                if (map[i + 1][j - 1] == 'x')
                    map[i][j]++;
            }
        }
    }
    for (int i = 2; i <= width - 1; i++)
    {
        if (map[0][i] != 'x')
        {
            if (map[0][i + 1] == 'x')
                map[0][i]++;
            if (map[1][i + 1] == 'x')
                map[0][i]++;
            if (map[1][i] == 'x')
                map[0][i]++;
            if (map[1][i - 1] == 'x')
                map[0][i]++;
            if (map[0][i - 1] == 'x')
                map[0][i]++;
        }
    }
    for (int i = 2; i <= height - 1; i++)
    {
        if (map[i][0] != 'x')
        {
            if (map[i - 1][0] == 'x')
                map[i][0]++;
            if (map[i - 1][1] == 'x')
                map[i][0]++;
            if (map[i][1] == 'x')
                map[i][0]++;
            if (map[i + 1][1] == 'x')
                map[i][0]++;
            if (map[i + 1][0] == 'x')
                map[i][0]++;
        }
        if (map[i][width] == 'x')
        {
            if (map[i - 1][width] == 'x')
                map[i][width]++;
            if (map[i - 1][width - 1] == 'x')
                map[i][width]++;
            if (map[i][width - 1] == 'x')
                map[i][width]++;
            if (map[i + 1][width - 1] == 'x')
                map[i][width]++;
            if (map[i + 1][width] == 'x')
                map[i][width]++;
        }
    }
    for (int i = 1; i < width; i++)
    {
        if (map[height][i] != 'x')
        {
            if (map[height][i - 1] == 'x')
                map[height ][i]++;
            if (map[height - 1][i - 1] == 'x')
                map[height][i]++;
            if (map[height - 1][i] == 'x')
                map[height][i]++;
            if (map[height - 1][i + 1] == 'x')
                map[height][i]++;
            if (map[height][i + 1] == 'x')
                map[height][i]++;
        }
    }
    ofstream fout("Message.txt");
    for (int i = 1; i <= height; i++)
    {
        for (int j = 1; j <= width; j++)
            fout << map[i][j] << " ";
        fout << endl;
    }
    fout << flush;
    fout.close();
    return 0;
}

Answer 1

前面的双循环，为啥从2开始，而不是从1开始呢？可能你第0列和第0行不想用，但为何中间一段又出现map[0][i]呢