22821:Oil Deposits

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#include <stdio.h>
#include<iostream>
#include<vector>
using namespace std;
char mp[105][105];
int visited[105][105]={0};
int r,c;
void dfs(int i,int j){
    if(i<0 || i>=r || j<0 || j>=c || visited[i][j]==1 || mp[i][j]=='*'){ //這個是要用“反”條件，如果是錯誤的條件就一直return，直到可行的條件就會執行下去
        return;
    }
    visited[i][j]=1;
    dfs(i-1,j-1);
    dfs(i-1,j);
    dfs(i-1,j+1);
    dfs(i,j+1);
    dfs(i+1,j+1);
    dfs(i+1,j);
    dfs(i+1,j-1);
    dfs(i,j-1);
}

int main()
{
    while(cin>>r>>c && r>0 && c>0){
        for(int i=0;i<r;i++){
            for(int j=0;j<c;j++){
                cin>>mp[i][j];
                visited[i][j]=0;
            }
        }
        int count=0;
        for(int i=0;i<r;i++){
            for(int j=0;j<c;j++){
                if(mp[i][j]=='@' && visited[i][j]==0){
                    dfs(i,j);  //要記得是 dfs() 不是 dfs[]
                    count++;
                }
            }
        }
        cout<<count<<endl;
    }
}