From 44412cd27b11ad2a7a145f4f5945e0e1de9a6bff Mon Sep 17 00:00:00 2001
From: panoplied <panoplied@protonmail.com>
Date: Fri, 27 Jun 2025 01:50:59 +0300
Subject: [PATCH] add C++ implementation of DFS example

---
 07_trees/c++/01_filesystem_dfs.cpp | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 07_trees/c++/01_filesystem_dfs.cpp

diff --git a/07_trees/c++/01_filesystem_dfs.cpp b/07_trees/c++/01_filesystem_dfs.cpp
new file mode 100644
index 00000000..18a15c5b
--- /dev/null
+++ b/07_trees/c++/01_filesystem_dfs.cpp
@@ -0,0 +1,30 @@
+#include <algorithm>
+#include <filesystem>
+#include <iostream>
+#include <vector>
+
+void printnames(const std::filesystem::path &dir) {
+  std::vector<std::filesystem::directory_entry> entries;
+  for (const auto &entry : std::filesystem::directory_iterator(dir)) {
+    entries.push_back(entry);
+  }
+
+  std::sort(entries.begin(), entries.end(),
+            [](const std::filesystem::directory_entry &a,
+               const std::filesystem::directory_entry &b) {
+              return a.path().filename() < b.path().filename();
+            });
+
+  for (const auto &entry : entries) {
+    if (entry.is_regular_file()) {
+      std::cout << entry.path().filename().string() << std::endl;
+    } else if (entry.is_directory()) {
+      printnames(entry.path());
+    }
+  }
+}
+
+int main() {
+  printnames("pics");
+  return 0;
+}