112 lines
2.7 KiB
C
112 lines
2.7 KiB
C
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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typedef struct tree {
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int key;//datatype
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struct tree *left, *right;
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struct tree *parent; // необязательное поле
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} tree;
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//Вычисляем высоту дерева
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int heightTree(tree* p)
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{
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if (p == NULL)
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return 0;
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else
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{
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/* вычисляем высоту каждого поддерева */
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int lheight = heightTree(p->left);
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int rheight = heightTree(p->right);
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if (lheight > rheight)
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return (lheight + 1);
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else
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return (rheight + 1);
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}
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}
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//Печатаем все узлы на уровне level
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void printCurrentLevel(tree* root, int level)
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{
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if (root == NULL)
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return;
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if (level == 1)
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printf("%d ", root->key);
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else if (level > 1)
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{
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//если поменять местами то будет обход справа на лево
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printCurrentLevel(root->left, level - 1);
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printCurrentLevel(root->right, level - 1);
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}
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}
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//функция печати
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void printBFS(tree* root)
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{
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int h = heightTree(root);
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for (int i = 1; i <= h; i++)
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printCurrentLevel(root, i);
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}
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void preorder(tree *root)
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{
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if(root == NULL)
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return;
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printf("%d ",root->key);
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if(root->left)
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preorder(root->left);
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if(root->right)
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preorder(root->right);
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}
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//Как инвертировать двоичное дерево
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void swap(tree *node)
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{
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tree *tmp = node->left;
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node->left = node->right;
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node->right = tmp;;
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}
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tree* invertTree(tree *root)
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{
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if(root)
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{
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invertTree(root->left);
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invertTree(root->right);
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swap(root);
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}
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return root;
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}
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int main(void)
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{
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tree *tr = NULL;
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//переимновываем узлы в предыдущем дереве
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tr = calloc(1,sizeof(tree));
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tr->key = 14;
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tr->right = calloc(1,sizeof(tree));
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tr->right->key = 17;
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tr->left = calloc(1,sizeof(tree));
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tr->left->key = 9;
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tr->left->left = calloc(1,sizeof(tree));
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tr->left->left->key=1;
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//добавляем узлы справа от 17
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//~ tr->right->key = 17;
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tr->right->left = calloc(1,sizeof(tree));
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tr->right->left->key = 15;//слева
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tr->right->right = calloc(1,sizeof(tree));
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tr->right->right->key = 20;//справа
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//печатаем дерево
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printf("BFS (Breadth First Traversal)\n");
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printBFS(tr);
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printf("\nPreorder\n");
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preorder(tr);
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printf("\n");
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invertTree(tr);
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printf("BFS (Breadth First Traversal)\n");
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printBFS(tr);
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printf("\nPreorder\n");
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preorder(tr);
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printf("\n");
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return 0;
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}
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