feat(codes/c): add C include/ codes and modify exist C codes

codes/c/include/print_util.h

@@ -0,0 +1,135 @@
+/**
+ * File: print_util.h
+ * Created Time: 2022-12-21
+ * Author: MolDum (moldum@163.com)、Reanon (793584285@qq.com)
+ */
+
+#ifndef PRINT_UTIL_H
+#define PRINT_UTIL_H
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "list_node.h"
+#include "tree_node.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/**
+ * @brief Print an Array
+ *
+ * @param arr
+ * @param size
+ */
+static void PrintArray(int *arr, int size) {
+    printf("[");
+    for (int i = 0; i < size - 1; i++) {
+        if (arr[i] != NIL) {
+            printf("%d, ", arr[i]);
+        } else {
+            printf("NULL, ");
+        }
+    }
+    if (arr[size - 1] != NIL) {
+        printf("%d]\n", arr[size - 1]);
+    }else{
+        printf("NULL]\n");
+    }
+}
+
+/**
+ * @brief Print a linked list
+ *
+ * @param head
+ */
+static void PrintLinkedList(ListNode *node) {
+    if (node == NULL) {
+        return;
+    }
+    while (node->next != NULL) {
+        printf("%d -> ", node->val);
+        node = node->next;
+    }
+    printf("%d\n", node->val);
+}
+
+struct Trunk {
+    struct Trunk *prev;
+    char *str;
+};
+
+typedef struct Trunk Trunk;
+
+Trunk *newTrunk(Trunk *prev, char *str) {
+    Trunk *trunk = (Trunk *) malloc(sizeof(Trunk));
+    trunk->prev = prev;
+    trunk->str = (char *) malloc(sizeof(char) * 10);
+    strcpy(trunk->str, str);
+    return trunk;
+}
+
+/**
+ * @brief Helper function to print branches of the binary tree
+ *
+ * @param trunk
+ */
+void showTrunks(Trunk *trunk) {
+    if (trunk == NULL) {
+        return;
+    }
+    showTrunks(trunk->prev);
+    printf("%s", trunk->str);
+}
+
+/**
+ * Help to print a binary tree, hide more details
+ * @param node
+ * @param prev
+ * @param isLeft
+ */
+static void printTreeHelper(TreeNode *node, Trunk *prev, bool isLeft) {
+    if (node == NULL) {
+        return;
+    }
+    char *prev_str = "    ";
+    Trunk *trunk = newTrunk(prev, prev_str);
+    printTreeHelper(node->right, trunk, true);
+    if (prev == NULL) {
+        trunk->str = "———";
+    } else if (isLeft) {
+        trunk->str = "/———";
+        prev_str = "   |";
+    } else {
+        trunk->str = "\\———";
+        prev->str = prev_str;
+    }
+    showTrunks(trunk);
+    printf("%d\n", node->val);
+
+    if (prev != NULL) {
+        prev->str = prev_str;
+    }
+    trunk->str = "   |";
+
+    printTreeHelper(node->left, trunk, false);
+}
+
+/**
+ * @brief Print a binary tree
+ *
+ * @param head
+ */
+static void PrintTree(TreeNode *root) {
+    printTreeHelper(root, NULL, false);
+}
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // PRINT_UTIL_H