Oil Deposits(dfs)

#include<cstdio>
#include<cstring>
#include<cmath>
using namespace std;
int n,m;
char grid[120][120];
int vis[120][120];
struct node{
    int x,y;
};
void in_put()
{
    memset(vis,0,sizeof(vis));
    for(int i=1;i<=n;++i)
    scanf("%s",grid[i]+1);
}
int check(node v)
{
    if(!vis[v.x][v.y]&&v.x>=1&&v.x<=n&&v.y>=1&&v.y<=m&&grid[v.x][v.y]==‘@‘)
    return 1;
    else return 0;
}
void dfs(node v)
{
    node nex;
    vis[v.x][v.y]=1;grid[v.x][v.y]=‘?‘;

    nex.x=v.x+1;nex.y=v.y;if(check(nex))    dfs(nex);
    nex.x=v.x+1;nex.y=v.y+1;if(check(nex))  dfs(nex);
    nex.x=v.x+1;nex.y=v.y-1;if(check(nex))  dfs(nex);
    nex.x=v.x;nex.y=v.y-1;if(check(nex))    dfs(nex);
    nex.x=v.x;nex.y=v.y+1;if(check(nex))    dfs(nex);
    nex.x=v.x-1;nex.y=v.y-1;if(check(nex))  dfs(nex);
    nex.x=v.x-1;nex.y=v.y+1;if(check(nex))  dfs(nex);
    nex.x=v.x-1;nex.y=v.y;if(check(nex))    dfs(nex);
}
int main()
{
    while(scanf("%d%d",&n,&m))
    {
        int cnt=0;node now;
        if(!n&&!m) break;
        in_put();
        for(int i=1;i<=n;++i)
            for(int j=1;j<=m;++j)
                if(grid[i][j]==‘@‘)
            {now.x=i;now.y=j;dfs(now);cnt++;}

            printf("%d\n",cnt);
    }
}