From d8b84c3699f6b0c35225cbd0ffb3e8af8c08d8ad Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rafa=C5=82=20-rsm-=20Marek?= <rsm@disroot.org>
Date: Fri, 24 May 2024 15:07:27 +0200
Subject: [PATCH] Exerc 4_14.

---
 .../4_14.swap_macro/Makefile                    |  3 +++
 .../4_14.swap_macro/main.c                      | 17 +++++++++++++++++
 .../4_14.swap_macro/swap.h                      | 11 +++++++++++
 .../4_14.swap_macro/tests/t0.tin                |  0
 .../4_14.swap_macro/tests/t0.tout               |  2 ++
 5 files changed, 33 insertions(+)
 create mode 100644 chapter_4.functions_progr_structure/4_14.swap_macro/Makefile
 create mode 100644 chapter_4.functions_progr_structure/4_14.swap_macro/main.c
 create mode 100644 chapter_4.functions_progr_structure/4_14.swap_macro/swap.h
 create mode 100644 chapter_4.functions_progr_structure/4_14.swap_macro/tests/t0.tin
 create mode 100644 chapter_4.functions_progr_structure/4_14.swap_macro/tests/t0.tout

diff --git a/chapter_4.functions_progr_structure/4_14.swap_macro/Makefile b/chapter_4.functions_progr_structure/4_14.swap_macro/Makefile
new file mode 100644
index 0000000..a059b35
--- /dev/null
+++ b/chapter_4.functions_progr_structure/4_14.swap_macro/Makefile
@@ -0,0 +1,3 @@
+BINARY=swap_macro
+
+include ../../Makefile.exerc
diff --git a/chapter_4.functions_progr_structure/4_14.swap_macro/main.c b/chapter_4.functions_progr_structure/4_14.swap_macro/main.c
new file mode 100644
index 0000000..6739166
--- /dev/null
+++ b/chapter_4.functions_progr_structure/4_14.swap_macro/main.c
@@ -0,0 +1,17 @@
+# include <stdio.h>
+# include "swap.h"
+
+int main ()
+{
+  char c0 = '0', c1 = '1';
+  int i0 = 10, i1 = 222;
+
+  printf("char: '%c', '%c' => '", c0, c1);
+  swap(char, c0, c1);
+  printf("%c', '%c'\n", c0, c1);
+  printf("int: %d, %d => ", i0, i1);
+  swap(int, i0, i1);
+  printf("%d, %d\n", i0, i1);
+
+  return 0;
+}
diff --git a/chapter_4.functions_progr_structure/4_14.swap_macro/swap.h b/chapter_4.functions_progr_structure/4_14.swap_macro/swap.h
new file mode 100644
index 0000000..13b60de
--- /dev/null
+++ b/chapter_4.functions_progr_structure/4_14.swap_macro/swap.h
@@ -0,0 +1,11 @@
+# ifndef SWAP_H
+# define SWAP_H
+
+# define swap(T, X, Y) \
+  {                    \
+    T c = X;           \
+    X = Y;             \
+    Y = c;             \
+  };                   \
+
+# endif
diff --git a/chapter_4.functions_progr_structure/4_14.swap_macro/tests/t0.tin b/chapter_4.functions_progr_structure/4_14.swap_macro/tests/t0.tin
new file mode 100644
index 0000000..e69de29
diff --git a/chapter_4.functions_progr_structure/4_14.swap_macro/tests/t0.tout b/chapter_4.functions_progr_structure/4_14.swap_macro/tests/t0.tout
new file mode 100644
index 0000000..cf6c517
--- /dev/null
+++ b/chapter_4.functions_progr_structure/4_14.swap_macro/tests/t0.tout
@@ -0,0 +1,2 @@
+char: '0', '1' => '1', '0'
+int: 10, 222 => 222, 10