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Grahf750

returning a reference to stl list

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I get null values when I try to get the position of something from my list so my first thought was maybe I wasn't returning a reference to my list correctly here is its implementation: C++
 list<Bullet*>& Character::getBullets()
{
	return bullets;
}

Here is some other information that might show a problem if that is the correct way to return a reference to the list I store bulllets that I shoot in a list. Here is my shoot function where I add a bullet to the list: C++
void Character::shoot()
{
	bullets.push_back(new Bullet(bulletID, curWep.getDmg(), curWep.getRange(), direction, 
					  x, y)); 
	bulletID++;
}

I then have a display class that updates the screen in their I have this: psuedo code: if player presses space shoot. I have check this it does do the shoot function when I press space bar C++
list<Bullet*>::iterator bulletsIter;
for (bulletsIter = player.getBullets().begin(); bulletsIter != player.getBullets().end(); bulletsIter++)
				{
					//if ((*bulletsIter)->getMonID() == (*mon).getMonID())
						//return *(*monstersIterator);
						bX = (*bulletsIter)->getPosX();
						bY = (*bulletsIter)->getPosY();
                                }


note: player inherits getBullets from character.

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There's nothing wrong with your syntax. Consider this simplified version of what you've described:


#include "stdafx.h"
#include <iostream>
#include <list>

struct Bullet {
static int s_nextID;
int ID;
Bullet():ID(s_nextID++) {}
};
int Bullet::s_nextID = 0;

class Projectiles {
private:
std::list<Bullet*> bullets;
public:
std::list<Bullet*>& GetBullets() { return bullets; }
void Shoot() {
bullets.push_back(new Bullet());
}
};

int _tmain(int argc, _TCHAR* argv[])
{
Projectiles proj;
proj.Shoot();
proj.Shoot();
proj.Shoot();

for (std::list<Bullet*>::iterator bullet = proj.GetBullets().begin();
bullet != proj.GetBullets().end();
bullet++)
{
std::cout << "Bullet in the air:" << (*bullet)->ID << '\n';
}
char c;
std::cin >> c;

return 0;
}




Output:

Bullet in the air:0
Bullet in the air:1
Bullet in the air:2


You'll need to find the problem in an unexpected area of your code. Trace your bullet pointers and see where they are allocated and deallocated.

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