Why am i getting these Link errors?
Why am i getting these Link errors?
Code:
1>main.obj : error LNK2019: unresolved external symbol "public: __thiscall mammal::mammal(void)" (??0mammal@@QAE@XZ) referenced in function "public: __thiscall dog::dog(void)" (??0dog@@QAE@XZ) 1>main.obj : error LNK2019: unresolved external symbol "public: virtual __thiscall mammal::~mammal(void)" (??1mammal@@UAE@XZ) referenced in function "public: virtual __thiscall dog::~dog(void)" (??1dog@@UAE@XZ)
using namespace std;
class mammal
{
public:
mammal(); //constructor
virtual ~mammal(); //destructor
virtual void speak() const { cout << "mammal\n"; }
};
class dog : public mammal
{
public:
void speak() const { cout << "dog\n"; }
};
class human : public mammal
{
public:
void speak() const { cout << "dog\n"; }
};
class bomberman : public mammal
{
public:
void speak() const { cout << "Bomberman pwns
\n"; }};[/php]
[php]#include "classes.h"
int main()
{
mammal *ptr;
mammal *speak;
startLoop:
while(true)
{
char choice;
cout << "(d)og (h)uman (b)omberman\n";
cin >> choice;
switch(choice)
{
case 'd':
ptr = new dog;
break;
case 'h':
ptr = new human;
break;
case 'b':
ptr = new bomberman;
break;
case 'q':
goto exit;
default:
cout << "not a choice, choose again\n";
goto startLoop;
}
speak = ptr;
speak->speak();
}
exit:
return 0;
}[/php]
dont mind the gotos
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Originally Posted by Void
