구조체 질문

 
struct data{
  char name; 
  int age; 
};
 
struct queue{ 
  struct data* array[10]; 
  int front; 
  int rear; 
}; 
 
void initqueue(struct queue* q){
  q->front = 0; 
  q->rear = 0; 
}
 
void enqueue(struct queue* q, struct data* d){
  q->array[q->rear] = d; 
  q->rear = (q->rear+1)%10; 
}
 
int main(){ 
 
  struct queue* q; 
  struct data* d; 
 
  initqueue(q); 
  enqueue(q, d); 
  if(q->array[0] == d)
    printf("success!"); 
  else
    printf("failed!"); 
}