From 9676acc893066e1008410f4341c5d43bace011bc Mon Sep 17 00:00:00 2001
From: studiosi <david@studiosi.es>
Date: Sat, 15 Aug 2026 17:20:47 +0300
Subject: [PATCH] Solved: 18 - Pointer Basics

---
 .../include/pointer_basics.hpp                |  2 +-
 .../src/pointer_basics.cpp                    | 21 +++++++++++++++----
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/modules/05_pointers_and_references/include/pointer_basics.hpp b/modules/05_pointers_and_references/include/pointer_basics.hpp
index 2b739fe..5e92b3f 100644
--- a/modules/05_pointers_and_references/include/pointer_basics.hpp
+++ b/modules/05_pointers_and_references/include/pointer_basics.hpp
@@ -2,7 +2,7 @@
 
 namespace pointers {
 
-[[nodiscard]] auto get_value(int* ptr) -> int;
+[[nodiscard]] auto get_value(const int* ptr) -> int;
 void set_value(int* ptr, int value);
 [[nodiscard]] auto is_null(const int* ptr) -> bool;
 void swap_via_pointers(int* a, int* b);
diff --git a/modules/05_pointers_and_references/src/pointer_basics.cpp b/modules/05_pointers_and_references/src/pointer_basics.cpp
index 9c8d103..1c57b91 100644
--- a/modules/05_pointers_and_references/src/pointer_basics.cpp
+++ b/modules/05_pointers_and_references/src/pointer_basics.cpp
@@ -2,9 +2,22 @@
 
 namespace pointers {
 
-auto get_value(int* ptr) -> int { (void)ptr; return 0; }
-void set_value(int* ptr, int value) { (void)ptr; (void)value; }
-auto is_null(const int* ptr) -> bool { (void)ptr; return true; }
-void swap_via_pointers(int* a, int* b) { (void)a; (void)b; }
+auto get_value(const int* ptr) -> int {
+    return *ptr;
+}
+
+void set_value(int* ptr, int value) {
+    *ptr = value;
+}
+
+auto is_null(const int* ptr) -> bool {
+    return ptr == nullptr;
+}
+
+void swap_via_pointers(int* a, int* b) {
+    const auto aux = *a;
+    *a = *b;
+    *b = aux;
+}
 
 }  // namespace pointers