Solved: 18 - Pointer Basics

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);

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; }
+auto get_value(const int* ptr) -> int {
-void set_value(int* ptr, int value) { (void)ptr; (void)value; }
+    return *ptr;
-auto is_null(const int* ptr) -> bool { (void)ptr; return true; }
+}
-void swap_via_pointers(int* a, int* b) { (void)a; (void)b; }
+
+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