Why “queue=new A[100];” cannot replace by “A queue[100];”?

Question

template <typename A>
class Queue {
int size;
A* queue; //定义一个指针变量，它的类型由生成实例时的参数决定
//int* queue;

public:
Queue() {
size = 0;
queue=new A[100];//此处不能写成 A queue[100];会溢出和报错

} …｝；

Answer 1

What are they different?