BinarySearchTree insert(ElementType e, BinarySearchTree root)
{
if(!root) {// find the node with its left or right being NULL
root = createBinarySearchTree(e);
if(root)
return root;
else
return NULL;
}
if(e > root->value) // the tree node with value e inserting into right child of the parent
root->right = insert(e, root->right);
else if(e < root->value) // the tree node withe value e inserting into left child of the parent
root->left = insert(e, root->left);
else
Error(" you cannot insert the node into the tree for its value equals to one in the tree");
return root; // dont't forget this line !
}
int main()
{
BinarySearchTree bst;
int value[] = {2, 8, 1, 5, 3, 4};
int i;
printf("\n ====== test for preordering the BinarySearchTree ====== \n");
printf("\n test for creating a binary search tree with root value 6 \n");
bst = createBinarySearchTree(6);
printPreorder(1, bst);
printf("\n test for insertint 6 nodes, that's 2, 8, 1, 5, 3 and 4 in turn \n");
for(i = 0; i < 6; i++)
insert(value[i], bst);
printPreorder(1, bst);
printf("\n test for find minimum \n");
printf(" the minimum is %2d, in this binary search tree! \n", findMin(bst)->value);
printf("\n test for find maximum \n");
printf(" the maximum is %2d, in this binary search tree! \n", findMax(bst)->value);
printf("\n test for deleting node '2' with two nodes from the binary search tree \n");
deleteBinarySearchTree(2, bst);
printPreorder(1, bst);
printf("\n test for deleting node '5' with one node from the binary search tree \n");
deleteBinarySearchTree(5, bst);
printPreorder(1, bst);
printf("\n test for deleting node '8' with zeron node from the binary search tree \n");
deleteBinarySearchTree(8, bst);
printPreorder(1, bst);
printf("\n test for inserting '8', '5' and '2' into the binary search tree \n");
insert(8, bst);
insert(5, bst);
insert(2, bst);
printPreorder(1, bst);
return 0;
}
int main()
{
BinarySearchTree *tree = createBinarySearchTree();
printf("Тестирование двоичного дерева поиска\n");
while (true)
{
printf("Возможные действия:\n");
printf("0 - выход\n");
printf("1 - добавить элемент в дерево\n");
printf("2 - удалить элемент из дерева\n");
printf("3 - проверить, есть ли элемент в дереве\n");
printf("4 - вывести элементы в порядке возрастания\n");
printf("5 - вывести элементы в порядке убывания\n");
printf("Введите номер действия: ");
int operationNumber = 0;
scanf("%d", &operationNumber);
switch (operationNumber)
{
case 0:
{
deleteBinarySearchTree(tree);
return 0;
}
case 1:
{
printf("Введите элемент для добавления: ");
int value = 0;
scanf("%d", &value);
addToBinarySearchTree(tree, value);
break;
}
case 2:
{
printf("Введите элемент для удаления: ");
int value = 0;
scanf("%d", &value);
removeFromBinarySearchTree(tree, value);
break;
}
case 3:
{
printf("Введите элемент для проверки: ");
int value = 0;
scanf("%d", &value);
if (existsInBinarySearchTree(tree, value))
printf("Элемент найден\n");
else
printf("Элемент не найден\n");
break;
}
case 4:
{
printLowToHigh(tree);
break;
}
case 5:
{
printHighToLow(tree);
break;
}
default:
{
printf("Некорректный номер действия\n");
break;
}
}
}
}