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狂晕中,实在找不到错啊,但还是WA,哪位大哥帮忙看下有什么问题

Posted by zhangli00 at 2007-05-09 14:30:56 on Problem 2386
#include <iostream>
using namespace std;
int M,N;
int b[102][102];
int a[8][2]={1,1,1,0,1,-1,0,1,0,-1,-1,1,-1,0,-1,1};
void DFS(int m,int n){
	b[m][n]=0;
	for(int t=0;t<8;t++){
			if(b[m+a[t][0]][n+a[t][1]]==1)
				DFS(m+a[t][0],n+a[t][1]);
	}
}
int main(){
	//freopen("a.in","r",stdin);
	int i,j,count;
	char ch;
	while(cin>>M>>N&&(M!=0||N!=0)){
		count=0;
		memset(b,0,sizeof(b));
	for(i=1;i<=M;i++)
		for(j=1;j<=N;j++){
			cin>>ch;
			if(ch=='W')b[i][j]=1;
			else b[i][j]=0;
		}
		for(i=1;i<=M;i++)
			for(j=1;j<=N;j++)
				if(b[i][j]==1){
				    DFS(i,j);
					count++;
				}
				cout<<count<<endl;
				}
				return 0;
}

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