Thread: Undeclare Variable????

Hi everybody,

i am creating my very first little game now, it is just the beginning of the game...however i found an error while compiling:

'obj' : undeclare identifier
it was in line 85.

Here is my program....:

Code:

#include <iostream.h>
#include <fstream.h>
#include <stdlib.h>
#include <string.h>

typedef char string[25];

class Digimon
{
private:
	string name;
	int health;
	int stamina;
public:
	Digimon(string="nothing", int=0, int=0);
	friend ostream& operator<<(ostream& out, Digimon& digi);
friend void Play(Digimon, Digimon);
void AttLost(int); 
};


Digimon::Digimon(string n, int hp, int sp)
{
	strcpy(name,n);
	health=hp;
	stamina=sp;
}

ostream& operator<<(ostream& out, Digimon& digi)
{
	out<<"Your Digimon STATS"<<endl;
	out<<"Your Digimon : "<<digi.name<<endl;
	out<<"Your HP : "<<digi.health<<endl;
	out<<"Your SP : "<<digi.stamina<<endl;
	return out;
}

void Play(Digimon enem, Digimon you)
{
    while ((enem.health==0)||(you.health==0))
    {
     cout<<you.name<<" ATTACK!!!"<<endl;
     enem.AttLost(2);
     cout<<enem.name<<" WOOF!!"<<endl;
     you.AttLost(1);
    }
    if (enem.health<=0)
    {
       cout<<"YOU WIN!!";
    }
    else
        cout<<"YOU LOST!!";
}
 

void Digimon::AttLost(int lostHP)
{
     health=health-lostHP;
}

void ChooseCharacter(int&);         //Function prototype

int main()
{
	int ans;
	ChooseCharacter(ans);
	if (ans==1)
	{
		Digimon obj("Guilmon", 25, 10);
		cout<<obj;
	}
	else if (ans==2)
	{
		Digimon obj("Renamon", 20, 20);
		cout<<obj;
	}
	else
	{
		Digimon obj("Terriermon", 22, 15);
		cout<<obj;
	}
    cout<<"You encounter a crazy stupid yet powerful digiMONSTER!!"<<endl;
    cout<<"IT is RUBYMON!!!"<<endl;
    Digimon enemy1("Rubymon", 8, 4);
    Play(enemy1,obj);                            //LINE 85!!! ERROR HERE!!
    
    cout<<enemy1;
    system("PAUSE");
	return 0;
}

void ChooseCharacter(int& ans)
{
	cout<<"Welcome to The Digital World"<<endl;
	cout<<"Please choose your favorite digimon to travel with you!"<<endl;
	cout<<"1.Guilmon"<<endl;
	cout<<"2.Renamon"<<endl;
	cout<<"3.Terriermon"<<endl;
	cin>>ans;
}

Thanks

ok..thanks, but what can i do to fix this problem??

Can i declare it outside the function and then create another "method function" call "setvalue" and call it inside the "if".

Ex:

class Digimon
{
......
public:
Digimon(string="nothing", int=0, int=0); //constructor
void setvalue(string, int, int); //new method function
}
...
void setvalue (string n, int hp, int sp)
{
strcpy(name, n);
health=hp;
stamina=sp;
}
..

...
int main()
{
Digimon obj;
if (ans==1)
obj.setvalue(...........);

etc
etc
etc
}


I'm not sure if i can do that...

That is a perfectly valid solution, there is nothing wrong with doing that especially considering that the object is created regardless of the result of the "if" statement. It's just the initial values that change.