用数组实现栈和队列C++

#include <stdlib.h>
#include <stdio.h>

class Stack
{
private:
   int ele[100];
   int top;
public:
   Stack() {
      top = 0;
   }
   void push(int v) {
      ele[top++] = v;
   }
   int pop() {
      if(isEmpty()) {
         printf("The stack is Empty.\n");
         return -1;
      }
      return ele[--top];
   }
   bool isEmpty() {
      return top == 0;
   }
   ~Stack() {
   }
};

#define SIZE 100
class Queue
{
private:
   int ele[SIZE];
   int head;
   int tail;
public:
   Queue() {
      head = 0;
      tail = 0;
   }
   bool isFull() {
      return (tail+1) % SIZE == head;
   }
   bool isEmpty() {
      return head == tail;
   }
   void enqueue(int val) {
      if(isFull()) {
         printf("The queue is full, can not enqueue for: %d\n", val);
         return;
      }
      ele[tail] = val;
      tail = (tail+1) %SIZE;
   }
   int dequeue() {
      if(isEmpty()) {
         printf("The queue is empty, can not dequeue.\n");
         return -1;
      }
      int value = ele[head];
      head = (head+1)%SIZE;
      return value;
   }
};

int main()
{
   Stack s;
   s.push(123);
   s.push(12);
   while(!s.isEmpty()) {
      printf("%d ", s.pop());
   }
   printf("\n");

   Queue q;
   q.enqueue(88);
   q.enqueue(13);
   q.enqueue(123);
   while(!q.isEmpty()) printf("%d ", q.dequeue());
   printf("\n");
   system("pause");
}

[root@localhost C++]# g++ push.cpp -o push
[root@localhost C++]# ./push
12 123
88 13 123
sh: pause: command not found