tsaiwn@magpie% g++ mystk.cpp
tsaiwn@magpie% ./a.out
53770880
tsaiwn@magpie% cat -n mystk.cpp
     1  //mystk.cpp --- CopyLeft by tsaiwn@csie.nctu.edu.tw
     2  //Object Oriented Programming features:
     3  //  Encapsulation
     4  //  Information hiding
     5  //  Inheritance
     6  //  Polymorphism
     7  //
     8  class MyStack{
     9     public:
    10        enum{NELEMENT=99};
    11     private:
    12        int data[NELEMENT];
    13        int stkptr;
    14     public:
    15        MyStack(void){ stkptr= -1; }
    16        void push(int);
    17        int pop(void);
    18        int top(void);
    19        int empty(void){ return (stkptr <= -1) ;}
    20        int isfull(void){ return (stkptr >= NELEMENT-1);}
    21  };
    22  
    23  void MyStack::push(int x)
    24  {
    25      stkptr++;
    26      data[stkptr] = x;
    27  }  
    28  inline int MyStack ::top(void)
    29  {
    30      return data[stkptr];
    31  }
    32  inline int MyStack ::pop(void)
    33  {
    34      if(stkptr> -1) --stkptr;
    35  }
    36  //
    37  #include<iostream.h>
    38  //#include<stack.h>
    39  int main( ){
    40     //stack <int> x;
    41     MyStack x;
    42     x.push(880);
    43     x.push(770);
    44     x.push(53);
    45     while(!x.empty()){
    46        cout << x.top();  x.pop();
    47     }
    48     cout << endl;
    49  }
    50  // 此例是把 stack 與 主程式寫在一個檔案, 這是偷懶且不好的方法
    51  // 正確方式應該把stack獨立, 且應把宣告寫在 .h 檔案, 實作寫 .cpp檔案

tsaiwn@magpie% g++ mystk.cpp
tsaiwn@magpie% ./a.out
53770880
tsaiwn@magpie% exit