Having problem in creating tree

kitten

hi to everyone

i want to create a tree with lots of children
i write this code:
@class Tree
{
friend class AIClass;
int v;
int **board;
QList<Tree> *children;
public:

Tree()
{
    v = 0;
    int n = 25;
    board=(int**) malloc((n)*sizeof(int*));
    for(int i=0;i<n;i++)
    {
        board[i]=(int*) malloc((n)*sizeof(int));
        for(int j=0;j<n;j++)
            board[i][j]=0;
    }
    children = new QList<Tree>();
}

Tree(int n)
{
    v = 0;
    board=(int**) malloc((n)*sizeof(int*));
    for(int i=0;i<n;i++)
    {
        board[i]=(int*) malloc((n)*sizeof(int));
        for(int j=0;j<n;j++)
            board[i][j]=0;
    }
    children = new QList<Tree>();
}
void setxy(int x,int y,int value)
{
    board[x][y] = value;
}

void setValue(int p)
{
    v = p;
}

};
class AIClass : public QObject
{
public:
int predict( Tree *item,int depth,int alpha,int beta,bool Player);

private:
Tree *root;
int board[25][25];
int count;
int k;
};
@
and i wrote this:
@
int AIClass::predict(Tree *item,int depth,int alpha,int beta,bool MaxPlayer)
{
for(int i=0;i<count;i++)
{
for(int j=0;j<count;j++)
{
if(item->board[i][j]==0) {
temp = new Tree(count);
for(int k=0;k<count;k++)
for(int h=0;h<count;h++)
{
temp->setxy(k,h,item->board[k][h]);
if((i==k)&&(j==h)) temp->setxy(k,h,2);
}
item->children->append(temp);
}
}
}
for (int i = 0; i < item->children->size(); ++i) {
int temp = predict(&(item->children->value(i)),depth-1,alpha,beta,!MaxPlayer);
if(temp > alpha)
alpha = temp;
if(beta < alpha) break;
}
item->setValue(alpha);
}@
( it is a part of alpha beta pruning algorithm)
but when it is compiled,the children does'nt get its value,after calling predict function,and again the v value in Tree class is 0 and does'nt get updated value
and i get this warning message:(i think the problem is):
@..\dooz\src\AIClass.cpp: In member function 'int AIClass::predict(Tree, int, int, int, bool)':
..\dooz\src\AIClass.cpp:98: warning: taking address of temporary@
what do you think?

DerManu

What line in your posted code does line AIClass.cpp:98 translate to?
And where does temp[m] come from in line 8 of AIClass::predict? Why do you redefine it to an int in line 21? And is temp[m] memory leaked (you deep-copy by value when appending * temp[m] to the list. Maybe you want a QList<Tree*> instead)?
Is children memory leaked? Where's the dtor deleting children?
Why do you mix malloc and new?

kitten

thanks alot i found the problem
i need QList<Tree *>