From 498b794ce5bae04495d916380927e9be23591e49 Mon Sep 17 00:00:00 2001
From: Thomas Schmucker <ts@its1.de>
Date: Wed, 29 Dec 2021 13:37:57 +0100
Subject: feat: implement insertsort

---
 insertsort.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 insertsort.c

(limited to 'insertsort.c')

diff --git a/insertsort.c b/insertsort.c
new file mode 100644
index 0000000..1a30a1a
--- /dev/null
+++ b/insertsort.c
@@ -0,0 +1,38 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+
+#include "util.h"
+
+typedef int T;
+
+void
+insertsort(T a[], size_t n)
+{
+	for ( size_t i = 1; i < n; ++i ) {
+		size_t  j     = i;
+		const T value = a[i];
+
+		for ( ; j > 0 && a[j - 1] > value; --j )
+			a[j] = a[j - 1];
+
+		a[j] = value;
+	}
+}
+
+int
+main(void)
+{
+	T a[10];
+
+	srand(time(NULL));
+	for ( size_t i = 0; i != NELEM(a); ++i )
+		a[i] = rand() % 100;
+
+	insertsort(a, NELEM(a));
+
+	for ( size_t i = 0; i != NELEM(a); ++i )
+		printf("%d ", a[i]);
+	putchar('\n');
+	return EXIT_SUCCESS;
+}
-- 
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