定义一个Dog类，它用静态数据成员记录Dog的个体数目，静态成员函数来存取Dogs。设计并测试这个类

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#include<iostream>
using namespace std;
class Dog
{
private:
	static int Dogs;
public:
	static getDogs();
	Dog()
	{Dogs++;}
};
 int Dog::getDogs()
	{return Dogs;}
 int Dog::Dogs=0;
void main()
{
	Dog A,B,C;
	cout<<"生成单身狗对象的数量为:"<<A.getDogs()<<endl;
}