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dfs 纯是自己做的,一次ac了,太爽了!!#include"iostream" using namespace std; int m,n; char array[101][101]; int path[101][101]; void dfs(int i,int j) { path[i][j]=1; //对没走过的点进行置1 记录表示已经走过不能在走了。 if(i-1>=0&&array[i-1][j]=='@'&&path[i-1][j]==0) dfs(i-1,j); if(i+1<m&&array[i+1][j]=='@'&&path[i+1][j]==0) dfs(i+1,j); if(j-1>=0&&array[i][j-1]=='@'&&path[i][j-1]==0) dfs(i,j-1); if(j+1<n&&array[i][j+1]=='@'&&path[i][j+1]==0) dfs(i,j+1); if(i-1>=0&&j-1>=0&&array[i-1][j-1]=='@'&&path[i-1][j-1]==0) dfs(i-1,j-1); if(i-1>=0&&j+1<n&&array[i-1][j+1]=='@'&&path[i-1][j+1]==0) dfs(i-1,j+1); if(i+1<m&&j-1>=0&&array[i+1][j-1]=='@'&&path[i+1][j-1]==0) dfs(i+1,j-1); if(i+1<m&&j+1<n&&array[i+1][j+1]=='@'&&path[i+1][j+1]==0) dfs(i+1,j+1); } int main() { while(cin>>m>>n,m) { int count=0; //用于对路径进行计算 memset(path,0,sizeof(path)); // 对path数组初始化,0表示没有走过 int i,j; for( i=0;i<m;i++) for( j=0;j<n;j++) cin>>array[i][j]; for(i=0;i<m;i++) for(j=0;j<n;j++) { if(array[i][j]=='@'&&path[i][j]==0) { count++; dfs(i,j); // 深度搜索 } } cout<<count<<endl; } return 1; } Followed by:
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