CODEWITHSUNDEEP
c++
user2252786
user2252786

Reputation: 1635

Writing to file - void issue

I have a void type function displaying a couple of integers to the console. I want these integers to be written to a file. This is the function I'm talking about:

void inorder(node *root)
{
    if(root)
    {
        inorder(root->left);
        std::cout << root->key << " ";
        inorder(root->right);
    }
}

I'm aware of the fact that it could have been done if I'd return array of integers. But it would complicate my code, I would have to add some kind of a count argument etc.

Is this possible to write the outcome of this function to a file?

Upvotes: 2

Views: 81

Answers (1)

juanchopanza
juanchopanza

Reputation: 227370

You could trivially change the function to take a reference to an std::ostream, then pass it an ofstream or std::cout depending on whether you want to write to a file or to the standard output:

void inorder(node *root, std::ostream& os)
{
  if(root)
  {
    inorder(root->left, os);
    os << root->key << " ";
    inorder(root->right, os);
  }
}

then

node* root = ....;

// write to stdout
inorder(root, std::cout);

// write to a file
std::ofstream myfile("myfile.txt");
inordet(root, myfile);

Upvotes: 3

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