Print out all root-to-leaf paths

/*
 Given a binary tree, print out all of its root-to-leaf
 paths, one per line. Uses a recursive helper to do the work.
*/
void printPaths(struct node* node) {
  int path[1000];
  printPathsRecur(node, path, 0);
}

/*
 Recursive helper function -- given a node, and an array containing
 the path from the root node up to but not including this node,
 print out all the root-leaf paths.
*/
void printPathsRecur(struct node* node, int path[], int pathLen) {
  if (node==NULL) return;

  // append this node to the path array
  path[pathLen] = node->data;
  pathLen++;

  // it's a leaf, so print the path that led to here
  if (node->left==NULL && node->right==NULL) {
    printArray(path, pathLen);
  }
  else {
  // otherwise try both subtrees
    printPathsRecur(node->left, path, pathLen);
    printPathsRecur(node->right, path, pathLen);
  }
}

// Utility that prints out an array on a line.
void printArray(int ints[], int len) {
  int i;
  for (i=0; i<len; i++) {
    printf("%d ", ints[i]);
  }
  printf("\n");
}