typedef struct Test Test;
typedef struct Test {
    char * name;
    int numOfElements;
    Test * test[];
}Test;

int main(void) {

    Test ** newStruct = malloc(sizeof(Test));

    (*newStruct)->name = NULL;
    (*newStruct)->numOfElements = 0;

    func(newStruct);
}

void func(Test ** newStruct) {

    (*newStruct)->numOfElements++;

}