CPP
cpp
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#include <iostream>
#include <vector>
#include <memory>
#include <algorithm>
using namespace std;
static int _intCnt = 1;
class IObserver
{
public:
IObserver(string strName) : m_intId(_intCnt), m_strName(strName) { ++_intCnt; }
virtual ~IObserver() = default;
string GetName() { return m_strName; }
int GetId() { return m_intId; }
virtual void notify(const string& strMsg) = 0;
private:
int m_intId;
string m_strName;
};
class Indviduals : public IObserver
{
public:
Indviduals(const string strName) : IObserver(strName) {}
void notify(const string& strMsg){
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