From 75221d012453a9ee2798a026198b61a0b8e3130b Mon Sep 17 00:00:00 2001
From: studiosi <david@studiosi.es>
Date: Sat, 22 Aug 2026 09:37:46 +0300
Subject: [PATCH] Solved: 39 - If Constexpr

---
 modules/11_cpp17/src/if_constexpr.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/modules/11_cpp17/src/if_constexpr.cpp b/modules/11_cpp17/src/if_constexpr.cpp
index 71acf71..3c18314 100644
--- a/modules/11_cpp17/src/if_constexpr.cpp
+++ b/modules/11_cpp17/src/if_constexpr.cpp
@@ -5,8 +5,12 @@
 namespace cpp17 {
 
 auto stringify_ints(const std::vector<int>& data) -> std::string {
-    (void)data;
-    return {};
+    auto oss = std::stringstream();
+    for (auto i = 0uz; i < data.size(); ++i) {
+        if (i > 0) oss << ",";
+        oss << data[i];
+    }
+    return oss.str();
 }
 
 }  // namespace cpp17