如何将结构数组传递给GPU？

struct Node
{
     int *ptr;
     int k;   
}*d_ptr;

int N=100;
int NumbOfNodes=5;
cudaMalloc((void **) &d_NodeArr, sizeof(Node)*NumbOfNodes);
for(int i=0;i<NumbOfNodes;i++)
    cudaMalloc((void **) d_NodeArr[i].Degree, sizeof(int)*N);

int N=100;
int NumbOfNodes=5;
int SIZE=(100*5)+5;//the +5 is for the k
cudaMalloc((void **) &d_ptr,sizeof(int)*SIZE);