~cpp class Stack { enum {Size=100}; private: int data[Size]; int top; bool IsEmpty(); bool IsFull(); public: Stack() { top=-1; } bool Push(int ndata); bool Pop(); void Show(); ~Stack() {} }; bool Stack::IsEmpty() { if(top==-1) return true; return false; } bool Stack::IsFull() { if(top==Size-1) return true; return false; } bool Stack::Push(int ndata) { if(!IsFull()) { data[++top]=ndata; return true; } else { cout<<"꽉 찼다"; return false; } } bool Stack::Pop() { if(!IsEmpty()) { top--; return true; } else { cout<<"비었다"; return false; } } void Show() { int temp=top; while(temp!=-1) cout<<data[temp--]; }
~cpp class Stack { private: struct Node { int m_nData; Node* m_pPrev; }; Node* Head; // 아무것도 없는 헤드 노드 하나 생성(요게 있으면 엄청 편함!) Node* top; bool IsEmpty(); public: Stack(); void Push(int x); void Pop(); void Show(); ~Stack(); }; Stack::Stack() { Head=new Node; Head->m_pPrev=NULL; top=Head; } void Stack::Push(int x) { Node* temp=new Node; temp->m_nData=x; temp->m_pPrev=top; top=temp; } bool Stack::Pop() { if(!IsEmpty()) { Node* temp=top->m_pPrev; delete top; top=temp; return true; } else { cout<<"비었다"; return false; } } void Stack::Show() { Node* temp=top; while(!IsEmpty()) { cout<<top->m_nData<<endl; top=top->m_pPrev; } top=temp; } bool Stack::IsEmpty() { if(top==Head) return true; return false; } Stack::~Stack() { while(!IsEmpty()) { Pop(); } delete Head; }