定义一个dog类，包含age、weight属性，以及对这些属性的操作方法。实现并测试这个类。
#include <iostream>
using namespace std;
class dog
{
int age,weight;
public:
void setdog(int Age,int Weight);
void display();
};
void dog::setdog(int Age,int Weight)
{
age=Age;
weight=Weight;
}
void dog::display()
{
cout<<age<<"\t"<<weight<<"\t"<<endl;
return;
}
int main()
{
dog d;
int age,weight;
cin>>age>>weight;
d.setdog(age,weight);
d.display();
return 0;
}