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#include <stdio.h> | |
#include <stdlib.h> | |
struct _Node { | |
struct _Node *left; | |
int val; | |
struct _Node *right; | |
}; | |
typedef struct _Node Node; | |
Node * NewNode(int val) { | |
Node *node = malloc(sizeof(Node)); | |
node->left = NULL; | |
node->val = val; | |
node->right = NULL; | |
return node; | |
} | |
void AddValue(Node *node, int val) { | |
if (val <= node->val) { | |
if (node->left == NULL) { | |
node->left = NewNode(val); | |
} else { | |
AddValue(node->left, val); | |
} | |
return; | |
} | |
if (node->right == NULL){ | |
node->right = NewNode(val); | |
} else { | |
AddValue(node->right, val); | |
} | |
return; | |
} | |
void DeleteNode(Node *node) { | |
if (node->left != NULL) { | |
DeleteNode(node->left); | |
} | |
if (node->right != NULL) { | |
DeleteNode(node->right); | |
} | |
free(node); | |
} | |
int main() { | |
Node *root = NewNode(2); | |
AddValue(root, 20); | |
AddValue(root, 1); | |
AddValue(root, 0); | |
AddValue(root, 21); | |
printf("main root %d\n", root->val); | |
printf("left root %d\n", root->left->val); | |
printf("right root %d\n", root->right->val); | |
printf("left of left root %d\n", root->left->left->val); | |
printf("right of right root %d\n", root->right->right->val); | |
DeleteNode(root); | |
} |
typedef กับ struct มันรวมกันไปได้เลยนะครับ แล้วไม่ต้องใช้คนละชื่อได้ครับ
typedef struct Node {
struct Node *left;
int val;
struct Node *right;
} Node;
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ตรงนี้
struct _Node {
struct _Node *left;
int val;
struct _Node *right;
};
typedef struct _Node Node;
เขียนแบบนี้ได้นะ สลับ typedef ไว้ข้างบน
typedef struct _Node Node;
struct _Node {
Node *left;
int val;
Node *right;
};