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

codes/c/include/include_test.c

@@ -0,0 +1,38 @@
+/**
+ * File: include_test.c
+ * Created Time: 2023-01-10
+ * Author: Reanon (793584285@qq.com)
+ */
+
+#include "include.h"
+
+void testListNode() {
+    int nums[] = {2, 3, 5, 6, 7};
+    int size = sizeof(nums) / sizeof(int);
+    ListNode *head = ArrayToLinkedList(nums, size);
+    PrintLinkedList(head);
+
+    ListNode *node = GetListNode(head, 5);
+    printf("find node: %d\n", node->val);
+}
+
+void testTreeNode() {
+    int nums[] = {1, 2, 3, NIL, 5, 6, NIL};
+    int size = sizeof(nums) / sizeof(int);
+    TreeNode *root = ArrayToTree(nums, size);
+
+    // print tree
+    PrintTree(root);
+
+    // tree to arr
+    int *arr = TreeToArray(root);
+    PrintArray(arr, size);
+}
+
+int main(int argc, char *argv[]) {
+    printf("==testListNode==\n");
+    testListNode();
+    printf("==testTreeNode==\n");
+    testTreeNode();
+    return 0;
+}