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发表于 2016-9-21 21:01:09
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显示全部楼层
这个就是我运行的
#include <iostream>
#include <string>
class Pet
{
public:
Pet(std::string theName);
~Pet();
static int getCount();
protected:
std::string name;
private:
static int count;
};
class Dog:public Pet
{
public:
Dog(std::string theName);
};
class Cat:public Pet
{
public:
Cat(std::string theName);
};
int Pet::count=0;
Pet::Pet(std::string theName)
{
name=theName;
}
Pet::~Pet()
{
count--;
std::cout<<name<<"挂掉了\n";
}
int Pet::getCount()
{
return count;
}
Dog::Dog(std::string theName):Pet(theName)
{
}
Cat::Cat(std::string theName):Pet(theName)
{
}
int main()
{
Dog dog("Tom");
Cat cat("Terry");
std::cout<<"\n已经诞生了"<<Pet::getCount()<<"zhichongwu\n\n";
{
Dog dog2("tom 2");
Cat cat2("jerry 2");
std::cout<<"\n现在呢,已经诞生了"<<Pet::getCount()<<"只宠物\n\n";
}
std::cout<<"\nAnd you're back to"<<Pet::getCount()<<"Pets!\n\n";
return 0;
} |
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