c++配列初期化

int dp[1][2];
memset(dp,0,sizeof(dp)); 

   int*visited=new int[arr[0]];
     delete [] visited;

   int** visited=new int*[arr[0]];
        for(int j=0;j<arr[0];j++){
            visited[j]=new int[arr[1]];
        }
for(int j=0;j<p;j++){
            delete [] visited[j];
        }