算法：

简单的一个dfs就能过
ac:

#include "iostream"
#include "algorithm"
#include "cstring"
#include "queue"
using std::cin;
using std::cout;
using std::endl;
#define N 110
char a[N][N];
int abook[N][N];
int n, m;
int next[8][2] = { {1,0},{-1,0},{0,-1},{0,1},{-1,-1},{-1,1},{1,1},{1,-1} };
void dfs(int x, int y) {
	abook[x][y] = 1;
	for (int i = 0; i <= 7; i++) {
		int x1 = x + next[i][0];
		int y1 = y + next[i][1];
		if (x1<1 || x1>n || y1<1 || y1>m || abook[x1][y1]||a[x1][y1]=='.')continue;
		dfs(x1, y1);
	}
}
int main() {
	int ans=0;
	cin >> n >> m;
	for (int i = 1; i <= n; i++) {
		for (int j = 1; j <= m; j++)
			cin >> a[i][j];
	}
	for (int i = 1; i <= n; i++) 
		for (int j = 1; j <= m; j++)
		{
			if (a[i][j] == 'W' && abook[i][j] == 0) {
				ans++;
				dfs(i, j);
			}
		}
	cout << ans;
}

 java:
数组：

package com.itheima.demo1;

import java.util.Scanner;

public class demo6 {
    public static void main(String[] args) {
        int a[] = {1, 2, 3};
        int[] b = new int[]{1, 3, 4};
        Scanner sc = new Scanner(System.in);
        for (int i = 3; i < 10; i++) {
            a[i] = sc.nextInt();
        }
        for (int i = 0; i < 10; i++) {
            System.out.println(a[i]);
        }
//x.fori:创建for循环0-4
        //数组长度:数组名.length
        //可以:数组名.fori,直接生成
        //int a[]=new int[]{12,23,34,1,2,4,5};
        //数组动态初始化:
        //数据类型 []数组名=new 数据类型 [数组长度]
        //例如:   int []arr=new int[3];
    }
}

package com.itheima.demo1;

import java.util.Scanner;

public class demo7 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        //x.fori:创建for循环0-4
        //数组长度:数组名.length
        //可以:数组名.fori,直接生成
        //int a[]=new int[]{12,23,34,1,2,4,5};
        //数组动态初始化:
        //数据类型 []数组名=new 数据类型 [数组长度]
        //例如:   int []arr=new int[3];
        int[] arr = new int[10];
        for (int i = 0; i < arr.length; i++) {
            arr[i] = sc.nextInt();
        }
        for (int i = 0; i < arr.length; i++) {
            System.out.println(arr[i]);
        }

    }
}

package com.itheima.demo1;

import java.util.Random;
import java.util.Scanner;

public class demo8 {
    public static void main(String[] args) {
        //生成随机数:类Random
        Scanner sc = new Scanner(System.in);
        Random r = new Random();
        //生成随机数:int number = r.nextInt(随机数的范围);
        int number = r.nextInt(100); //0-99
        System.out.println(number);
        for (int i = 0; i < 10; i++) {
            number = r.nextInt(9)+7;    //7-15
            System.out.print(number+" ");
        //重点:把ln删掉就不会换行了
        }
        System.out.println("\n");
        //foreach循环：自动迭代数组的每个元素
       //格式: for(type 形参:实参),type：数据类型
        //  {
        //      System.out.println(形参);
        //          }
        int []book=new int[]{1,2,3,4,5};
        for(int b:book){
            System.out.println(b);
        }
    }
}