时间复杂度为O（1），求栈最大最小值和pop，push操作

时间复杂度为O（1），求栈最大最小值和pop，push操作
#ifndef _MSTACK
#define _MSTACK

#include <stdio.h>

template<class T>
struct MStack{
  MStack<T>* prev;
  T Data;
};

template<class T>
class CMStack{
public:
  CMStack(){
  top =NULL;
  count =0;
  MaxTop =NULL;
  MinTop =NULL;
  };

  T pop();
  void Push(T Value);
  T GetMaxValue();
  T GetMinValue();
  int GetCount();

private:
  MStack<T>* top;
  MStack<T>* MaxTop;
  MStack<T>* MinTop;

  T Data;
  int count;

  void MaxPush(T);
  void MinPush(T);

  void MaxPop();
  void MinPop();

};

template<class T>
T CMStack<T>::pop(){

  if (count ==0) {
  return NULL;
  }

  T data;
  MStack<T>* temp =top;
  top =top->prev;

  data =temp->Data;
  delete temp;
  temp =NULL;

  if(data ==GetMaxValue() && MaxTop !=NULL){
  MaxPop();
  }

  if(data ==GetMinValue() && MinTop !=NULL){
  MinPop();
  }

  return data;
}

template<class T>
void CMStack<T>::Push(T value){
  if (top ==NULL) {
  top =new MStack<T>;
  top->prev =NULL;

  top->Data =value;
  count ++;

  }else{
  MStack<T>* temp =new MStack<T>;
  temp->Data =value;
  temp->prev =top;

  count++;
  top =temp;
  temp =NULL;
  }
   
  if (MaxTop == NULL) {
  MaxPush(value);
  }else if(value >=GetMaxValue()){
  MaxPush(value);
  }

  if (MinTop == NULL) {
  MinPush(value);
  }else if(value <= GetMinValue()){
  MinPush(value);
  }

};

template<class T>
void CMStack<T>::MaxPop(){
  if(MaxTop == NULL) return;
   
  MStack<T>* temp =MaxTop;
  MaxTop =MaxTop->prev;
  temp->prev =NULL;

  delete temp;
  temp =NULL;
};

template<class T>
void CMStack<T>::MinPop(){
  if(MinTop == NULL) return;

  MStack<T>* temp =MinTop;
  MinTop =MinTop->prev;
  temp->prev =NULL;

  delete temp;
  temp =NULL;
};

template<class T>
void CMStack<T>::MaxPush(T val){
  if (MaxTop ==NULL) {
  MaxTop =new MStack<T>;
  MaxTop->prev =NULL;

  MaxTop->Data =val;
  return ;
  }

  MStack<T>* temp =new MStack<T>;
  temp->Data =val;
  temp->prev =MaxTop;

  MaxTop =temp;
  temp =NULL;
};

template<class T>
void CMStack<T>::MinPush(T val){
  if (MinTop ==NULL) {
  MinTop =new MStack<T>;
  MinTop->prev =NULL;

  MinTop->Data =val;

  return ;
  }

  MStack<T>* temp =new MStack<T>;
  temp->Data =val;
  temp->prev =MinTop;

  MinTop =temp;
  temp =NULL;
};

template<class T>
T CMStack<T>::GetMaxValue(){
  return MaxTop->Data;
}

template<class T>
T CMStack<T>::GetMinValue(){
  return MinTop->Data;
};

template<class T>
int CMStack<T>::GetCount(){

  return count;
};

#endif

调试： 
C/C++ code

#include "MStack.h"
#include <iostream>

using namespace std;

int main()
{

  CMStack<int> s;

// for(int i =0;i<10;++i)
// s.Push(i % 5);
  s.Push(6);s.Push(4);s.Push(2);s.Push(3);s.Push(7);s.Push(1);s.Push(6);s.Push(7);s.Push(8);s.Push(10);
  s.Push(5);s.Push(9);s.Push(12);s.Push(13);s.Push(22);s.Push(1);s.Push(16);s.Push(17);s.Push(18);s.Push(10);

  for (int i =0;i<s.GetCount() ;i++){
  if(i ==8) {
  s.Push(20);
  cout<<"Push:"<<20<<endl;
  }
   
  if(s.GetCount()>0){  
  cout<<"Max Value:"<<s.GetMaxValue()<<";Min value:"<<s.GetMinValue()<<endl;
  }
  cout<<"Pop:"<<s.pop()<<endl;
  }

  return 0;
}