如何在struct的3维指针中访问指针数组

Question

I have these structs declared :

typedef struct
{
  double* weight;
  char *etiquette;

  double active;
}Neuron;

typedef struct
{
  Neuron **grid;
  Neuron *capteur;
  double alpha;
  int rv;
}SOM;

and then somewhere in my program I have a pointer to the second structure

SOM *net;

then I want to access the *weight variable from net. I can access it with

net->capteur->weight;

but net->grid[0][0]->weight has errors. Then I use net->grid[0][0].weight and it compiles but gives me a segmentaion fault. What is wrong with net->capteur->weight; statement and how can I fix it?

Answer 1

grid and weight are pointer. Have you initialize it? if you want to read weight value you should do: *(net->grid[0][0].weight)