Access violation writing location 0x00000003 - deep-learning

Question

So, I'm writing a DQL Neural network. When I run the code through the debugger, it throws this exception
Exception thrown at 0x00D05DFB in Deep Q-learning Neural
Network.exe: 0xC0000005: Access violation writing location 0x00000003.
Here is the relevant code:
The neuron structure:
typedef struct neuron_t {
// not entirely relevant to this problem, but it's nicer to have the full picture
float activation;
float* outputWeights;
float bias;
float z;
float dactv;
float* dw;
float dbias;
float dz;
}Neuron;
The layer structure:
typedef struct layer_t {
int numberOfNeurons;
Neuron* neu;
}Layer;
the main function:
Layer* testTarget = NULL;
Layer* test = NULL;
int numberOfLayers = 3;
int* neuronInlayer[] = { 2,3,4 };
test = createPredictionArchitecture(test, testTarget, numberOfLayers, neuronInlayer); /* I plan to turn this into merely
createPredictionArchitecture(test, testTarget, numberOfLayers, neuronInlayer) once this problem
is fixed.*/
The relevant bit of the createArchitecture function:
int createArchitecture(Layer* predictionNetwork, Layer* targetNetwork, int numberOfLayers, int* neuronInEachLayer) {
predictionNetwork = (Layer*)malloc(numberOfLayers * sizeof(Layer)); if (predictionNetwork == NULL) { fprintf(stderr, "Failed to allocate memory to 'predictionNetwork' in line %d\n ", __LINE__); exit(1); }
else {
printf("Memory successfully allocated to 'predictionNetwork'\n");
}
targetNetwork = (Layer*)malloc(numberOfLayers * sizeof(Layer)); if (targetNetwork == NULL) { fprintf(stderr, "Failed to allocate memory to 'predictionNetwork' in line %d\n ", __LINE__); exit(1); }
else {
printf("Memory successfully allocated to 'targetNetwork'\n");
}
Layer** targetNW = &targetNetwork;
...
}
The exception occurs when I do this:
*targetNW[i] = createLayer(neuronInEachLayer[i]);
Why does this happen, and how should I fix it?
And also, do say if you need to see more of the code.

Answer 1

Well, I figured out the problem; I wasn't assigning any memory to targetNW.