UC知道vc++编c++程序，编译时没错，连接时出错
来源：百度知道 编辑：UC知道 时间：2024/05/31 21:01:18
linking下写着：
main.obj : error LNK2001: unresolved external symbol "public: int __thiscall fish::eat(void)" (?eat@fish@@QAEHXZ)
Debug/animal main.exe : fatal error LNK1120: 1 unresolved externals
是我的代码没写好还是软件或系统的问题？急死我了
代码是如下，大家能不能指明我到底哪行错了，怎么改，多谢了：
#include <iostream.h>
class animal
{
public:
animal(int height,int weight);
void eat();
virtual void breathe();
virtual void sleep()=0;
};
animal::animal(int height,int weight)
{
cout<<"its height is "<<height<<endl;
cout<<"its weight is "<<weight<<endl;
};
void animal::eat()
{
cout<<"eat with mouth"<<endl;
};
void animal::breathe()
{
cout<<"breathe with lung"<<endl;
};
class fish:public animal
{
public:
fish(int
main.obj : error LNK2001: unresolved external symbol "public: int __thiscall fish::eat(void)" (?eat@fish@@QAEHXZ)
Debug/animal main.exe : fatal error LNK1120: 1 unresolved externals
是我的代码没写好还是软件或系统的问题？急死我了
代码是如下，大家能不能指明我到底哪行错了，怎么改，多谢了：
#include <iostream.h>
class animal
{
public:
animal(int height,int weight);
void eat();
virtual void breathe();
virtual void sleep()=0;
};
animal::animal(int height,int weight)
{
cout<<"its height is "<<height<<endl;
cout<<"its weight is "<<weight<<endl;
};
void animal::eat()
{
cout<<"eat with mouth"<<endl;
};
void animal::breathe()
{
cout<<"breathe with lung"<<endl;
};
class fish:public animal
{
public:
fish(int
你还少一个实现函数
void fish::eat()
{
cout<<"fish with mouth"<<endl;
};
是主程序头出了问题，你把代码全部给我我来帮你
unresolved external symbol "public: int __thiscall fish::eat(void)" 意思是类中fish没有在主函数中调用．
fish类中声明的eat方法没有实现
eat函数没有定义