unable to read value from pointer

Question

can't read data from void pointer:

#include <windows.h>

typedef enum {
    ADDRESS,
    PERSON,
} DataType;

typedef struct {
    DataType type;
    void* data;
} Data;

Data* create_data(DataType type, void* data);

typedef struct {
    char* number;
    char* street;
    char* city;
    char* state;
    char* postalCode;
} Address;

typedef struct {
    int age;
    char* name;
} Person;

int CALLBACK WinMain(
    HINSTANCE hInstance,
    HINSTANCE hPrevInstance,
    LPSTR     lpCmdLine,
    int       nShowCmd
) {
    // WRITE

    Address* home = malloc(sizeof(Address));
    home->number = "123";
    home->street = "Main";
    home->city = "New York";
    home->state = "NY";
    home->postalCode = "10001";

    Data* addressdata = create_data(ADDRESS, &home);

    // READ

    char* addressstreet = ((Address*)addressdata->data)->street;

}

Data* create_data(DataType type, void* data)
{
    Data* d = (Data*)malloc(sizeof(Data));
    d->type = type;
    d->data = data;

    return d;
}

Answer 1

After reading your question, the first thing popped in my head is that how can you dereference a void pointer since it has no object type.

There's parameter mismatch in

Data* create_data(DataType type, void* data); & Data* addressdata = create_data(ADDRESS, &home);

and instead of sending address of home, i.e. create_data(ADDRESS, &home); send create_data(ADDRESS, home);