Declaration is incompatible error
Jan 20, 2012 at 1:21pm
Whenever I compile this, the skeleton class and the player class cannot pass the respective other object in. Please help.
The error happens on 34/51 (prototype/declaration) and 47/67 (prototype/declaration).
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|
// Dungeons Game
// A Win32 Console based pseudo-RPG
#include <iostream>
using namespace std;
// Begin LivingThing class
class LivingThing
{
public:
// Constructors
LivingThing() {}
~LivingThing() {}
// Accessors
void DisplayHealth() const { cout << m_Attack; }
bool IsAlive() const { return m_Alive; }
protected:
unsigned short m_Attack;
unsigned short m_Mana;
short m_Health;
bool m_Alive;
};
// Begin Player class
class Player : public LivingThing
{
public:
// Constructors
Player() { m_Attack = 7; m_Health = 30; m_Mana; }
~Player() {}
// Dealing damage and taking damage functions
void Attack(Skeleton& skeletonInstance);
void TakeDamage(int damage);
};
// Begin Skeleton class
class Skeleton : public LivingThing
{
public:
// Constructors
Skeleton() { m_Attack = 5; m_Health = 10; m_Mana = 0; }
~Skeleton() {}
// Dealing damage and taking damage functions
void Attack(Player& playerInstance);
void TakeDamage(int damage);
};
void Player::Attack(Skeleton& skeletonInstance)
{
cout << "Player attacks 'Skeleton' for " << m_Attack << " damage.";
skeletonInstance.TakeDamage(m_Attack);
}
void Player::TakeDamage(int damage)
{
m_Health -= damage;
if (m_Health <= 0)
{
cout << "Player is dead";
m_Alive = false;
}
}
void Skeleton::Attack(Player& playerInstance)
{
cout << "Skeleton attacks 'Player' for " << m_Attack << " damage.";
playerInstance.TakeDamage(m_Attack);
}
void Skeleton::TakeDamage(int damage)
{
m_Health -= damage;
if (m_Health <= 0)
{
cout << "Skeleton is dead";
m_Alive = false;
}
}
// Main entry point
int main()
{
enum OBJECTS {player, skeleton};
short skeletonKillCount = 0;
// Create a player instance
Player player1;
// Create three Skeleton instances
Skeleton skeleton1;
Skeleton skeleton2;
Skeleton skeleton3;
Skeleton curSkeleton;
// Run until either player is dead or all 3 skeletons have been defeated
// Main game loop
do
{
// Assign the skeleton number to the curSkeleton variable
if (skeleton1.IsAlive()) {
Skeleton curSkeleton = skeleton1;
}
else if (skeleton2.IsAlive())
{
Skeleton curSkeleton = skeleton2;
}
else if (skeleton3.IsAlive())
{
Skeleton curSkeleton = skeleton3;
}
// Perform the actions
player1.Attack(curSkeleton);
curSkeleton.Attack(player1);
system("pause");
// Display all healths
player1.DisplayHealth();
curSkeleton.DisplayHealth();
if (curSkeleton.IsAlive() == false) {
skeletonKillCount++;
}
if (curSkeleton.IsAlive() == false) {
cout << "You died after killing " << skeletonKillCount << " skeletons. Better luck next time.";
system("pause");
return 0;
}
} while (skeletonKillCount < 3);
cout << "You survived! You killed all 3 skeletons with ";
player1.DisplayHealth();
cout << " health left.";
system("pause");
return 0;
}
|
Jan 20, 2012 at 1:25pm
The problem is that you try use Skeleton before it has been declared. A simple forward declaration above 26 will make it work.
class Skeleton;
Jan 20, 2012 at 1:46pm
Thanks. That did the trick.
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