From 68765e02ac949e857a9f467f7ebf988342395348 Mon Sep 17 00:00:00 2001
From: h1110050 <h1110050@github.com>
Date: Sun, 27 Oct 2019 21:39:29 +0800
Subject: [PATCH] An example of how to use pointers in functions in C

---
 pointer_functions.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 pointer_functions.c

diff --git a/pointer_functions.c b/pointer_functions.c
new file mode 100644
index 0000000..5666966
--- /dev/null
+++ b/pointer_functions.c
@@ -0,0 +1,30 @@
+/*  This program swaps values by passing variables as pointers into a function in C.
+ *  Author: h1110050
+ *  Profile: http://github.com/h1110050
+ */
+
+#include <stdio.h>
+
+void swap(int *, int *);
+
+int main(void) {
+    int a = 1, b = 3;
+
+    printf("a is %d, b is %d\n", a, b);
+
+    // Pass in the address if you want the change to persist in main function.
+    swap(&a, &b);
+
+    printf("a is %d, b is %d\n", a, b);
+
+    return 0;
+}
+
+void swap(int *a, int *b) {
+    int temp;
+
+    // Swap the pointers.
+    temp = *a;
+    *a = *b;
+    *b = temp;
+}
\ No newline at end of file