// Eg10-10.cpp
#include <iostream>
using namespace std;
const int MAX = 3;
class Full {};  // L1  堆栈满时抛出的异常类
class Empty {}; // L2  堆栈空时抛出的异常类
class Stack {
private:
  int s[MAX];
  int top;

public:
  void push(int a);
  int pop();
  Stack() { top = -1; }
};
void Stack::push(int a) {
  if (top >= MAX - 1)
    throw Full();
  s[++top] = a;
}
int Stack::pop() {
  if (top < 0)
    throw Empty();
  return s[top--];
}
int main() {
  Stack s;
  try {
    s.push(10);
    s.push(20);
    s.push(30);
    // s.push(40);	//L5  将产生栈满异常
    cout << "stack(0)= " << s.pop() << endl;
    cout << "stack(1)= " << s.pop() << endl;
    cout << "stack(2)= " << s.pop() << endl;
    cout << "stack(3)= " << s.pop() << endl; // L6
  } catch (Full) {
    cout << "Exception: Stack Full" << endl;
  } catch (Empty) {
    cout << "Exception: Stack Empty" << endl;
  }
  
  return 0;
}