C++ new二维数组

arr[m][n]的创建与释放

//创建
int **arr = new int *[m];
for( int i=0; i<m; i++ )
{
    arr[i] = new int [n]  ;
}

//释放
for( int i=0; i<m; i++ )
{
    delete [] arr[i];
}
delete arr;