• inter9988 yahoo.com Mar 25 2006
• Bertel Brander <bertel post4.tele.dk> Mar 26 2006

the code  :
/*
class creature
{
char name[20];
int strenght;
char item[20][20];
};

main()
{
creature dog1;
creature dog2;
creature tiger;

// i want to print all the creatures. cuz im making aruond 200 creatures.
// is there anyway to printout or count all the creatures.
// something like : for(i=0;i<MX_CREATURE;i++){ printCreatureState(); }

}

*/

im new to c++. any idea ?

inter9988 yahoo.com wrote:

 // i want to print all the creatures. cuz im making aruond 200 creatures.
 // is there anyway to printout or count all the creatures.
 // something like : for(i=0;i<MX_CREATURE;i++){ printCreatureState(); }
 
 
 im new to c++. any idea ?


I see two solutions:
1: Let the user of the creatures (in your case main) create a list.
2: Let the creatures themself create the list.

To do the latter:
Have a list of pointers to creatures:
std::list<creature *> CreatureList;

Add constructors to the creature class:
    creature();
    ~creature();

Let the constructor add itself to the list:
creature::creature()
{
    CreatureList.push_back(this);
}

And let the destructor remove it again:
creature::~creature()
{
    std::list<creature *>::iterator it = std::find(CreatureList.begin(), 
CreatureList.end(), this);
    if(it != CreatureList.end())
       CreatureList.erase(it);
    else
       std::cout << "Ups, failed to find me in the list" << std::endl;
}

I made the following test program to test it:
#include <iostream>
#include <list>

class creature
{
public:
    creature();
    ~creature();

    char name[20];
    int strenght;
    char item[20][20];
};

std::list<creature *> CreatureList;

creature::creature()
{
    CreatureList.push_back(this);
}

creature::~creature()
{
    std::list<creature *>::iterator it = std::find(CreatureList.begin(), 
CreatureList.end(), this);
    if(it != CreatureList.end())
       CreatureList.erase(it);
    else
       std::cout << "Ups, failed to find me in the list" << std::endl;
}

std::ostream& operator << (std::ostream& os, const creature& cr)
{
    os << cr.name;
    return os;
}

int main()
{
    creature dog1;
    strcpy(dog1.name, "Dog1");
    creature dog2;
    strcpy(dog2.name, "Dog2");
    creature tiger;
    strcpy(tiger.name, "Tiger");

    std::list<creature *>::iterator it;
    for(it = CreatureList.begin(); it != CreatureList.end(); ++it)
       std::cout << *(*it) << std::endl;
}

-- 
Absolutely not the best homepage on the net:
http://home20.inet.tele.dk/midgaard
But it's mine - Bertel