From c9b6b9a5ca082fe7c1b6f58d7713f785a9eb6a5c Mon Sep 17 00:00:00 2001
From: Martial Simon <msimon_fr@hotmail.com>
Date: Mon, 15 Sep 2025 01:08:27 +0200
Subject: add: graphs et rushs

---
 graphs/cpp/ref_swap/main.cc     | 17 +++++++++++++++++
 graphs/cpp/ref_swap/ref_swap.cc | 18 ++++++++++++++++++
 graphs/cpp/ref_swap/ref_swap.hh |  5 +++++
 3 files changed, 40 insertions(+)
 create mode 100644 graphs/cpp/ref_swap/main.cc
 create mode 100644 graphs/cpp/ref_swap/ref_swap.cc
 create mode 100644 graphs/cpp/ref_swap/ref_swap.hh

(limited to 'graphs/cpp/ref_swap')

diff --git a/graphs/cpp/ref_swap/main.cc b/graphs/cpp/ref_swap/main.cc
new file mode 100644
index 0000000..487ab6d
--- /dev/null
+++ b/graphs/cpp/ref_swap/main.cc
@@ -0,0 +1,17 @@
+#include <iostream>
+
+#include "ref_swap.hh"
+
+int main()
+{
+    int a = 3;
+    int b = 19;
+
+    std::cout << "Before: a = " << a << ", b = " << b << '\n';
+    ref_swap(a, b);
+    std::cout << "After: a = " << a << ", b = " << b << '\n';
+
+    std::cout << "Before: a = " << a << ", b = " << b << '\n';
+    ptr_swap(&a, &b);
+    std::cout << "After: a = " << a << ", b = " << b << '\n';
+}
diff --git a/graphs/cpp/ref_swap/ref_swap.cc b/graphs/cpp/ref_swap/ref_swap.cc
new file mode 100644
index 0000000..44cb203
--- /dev/null
+++ b/graphs/cpp/ref_swap/ref_swap.cc
@@ -0,0 +1,18 @@
+//
+// Created by martial.simon on 2/24/25.
+//
+void ref_swap(int& a, int& b)
+{
+    int tmp = a;
+    a = b;
+    b = tmp;
+}
+
+void ptr_swap(int* a, int* b)
+{
+    if (!a || !b)
+        return;
+    int tmp = *a;
+    *a = *b;
+    *b = tmp;
+}
\ No newline at end of file
diff --git a/graphs/cpp/ref_swap/ref_swap.hh b/graphs/cpp/ref_swap/ref_swap.hh
new file mode 100644
index 0000000..1f194b3
--- /dev/null
+++ b/graphs/cpp/ref_swap/ref_swap.hh
@@ -0,0 +1,5 @@
+#pragma once
+
+void ref_swap(int& a, int& b);
+
+void ptr_swap(int* a, int* b);
-- 
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