class Animal{
public:
virtual void showme()=0;};
class dog:public Animal
{public:
int zhonglei;
char name;
char food;
double weight;
void showme()
{
cout<<"狗的种类:"<<a.zhonglei<<endl;
cout<<"狗的名称:"<<a.name<<endl;
cout<<"狗喜爱的食物:"<<a.food<<endl;
cout<<"狗的体重:"<<a.weight<<endl;
}
类猫与类狗一样
如何写运算符<<的重载函数 ,可以一次输入狗和猫喜爱的食物和体重
public:
virtual void showme()=0;};
class dog:public Animal
{public:
int zhonglei;
char name;
char food;
double weight;
void showme()
{
cout<<"狗的种类:"<<a.zhonglei<<endl;
cout<<"狗的名称:"<<a.name<<endl;
cout<<"狗喜爱的食物:"<<a.food<<endl;
cout<<"狗的体重:"<<a.weight<<endl;
}
类猫与类狗一样
如何写运算符<<的重载函数 ,可以一次输入狗和猫喜爱的食物和体重
#include <iostream>
using namespace std;
class Animal{
public:
virtual void showme()=0;
};class dog:public Animal
{
public:
int zhonglei;
char name;
char food;
double weight; void showme()
{
cout<<"狗的种类:"<<zhonglei<<endl;
cout<<"狗的名称:"<<name<<endl;
cout<<"狗喜爱的食物:"<<food<<endl;
cout<<"狗的体重:"<<weight<<endl;
} friend std::ostream& operator << (ostream& o , dog& d)
{
cout<<"狗的种类:"<<d.zhonglei<<endl;
cout<<"狗的名称:"<<d.name<<endl;
cout<<"狗喜爱的食物:"<<d.food<<endl;
cout<<"狗的体重:"<<d.weight<<endl;
return o;
}};int main
{ dog a; cout << a;
return 0;
}
using namespace std;
class Animal{
public:
virtual void showme()=0;
};class dog:public Animal
{
public:
int zhonglei;
char name;
char food;
double weight; void showme()
{
cout<<"狗的种类:"<<zhonglei<<endl;
cout<<"狗的名称:"<<name<<endl;
cout<<"狗喜爱的食物:"<<food<<endl;
cout<<"狗的体重:"<<weight<<endl;
} friend std::ostream& operator << (ostream& o , dog& d)
{
o<<"狗的种类:"<<d.zhonglei<<endl;
o<<"狗的名称:"<<d.name<<endl;
o<<"狗喜爱的食物:"<<d.food<<endl;
o<<"狗的体重:"<<d.weight<<endl;
return o;
}};