From 0b43d984905f07c59e3236d98d4e27409aba3cda Mon Sep 17 00:00:00 2001
From: Sebastiano Tronto <sebastiano@tronto.net>
Date: Fri, 17 Jan 2025 16:23:24 +0100
Subject: More stuff with templates

---
 templates/factorial.cpp | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 templates/factorial.cpp

(limited to 'templates/factorial.cpp')

diff --git a/templates/factorial.cpp b/templates/factorial.cpp
new file mode 100644
index 0000000..11e4789
--- /dev/null
+++ b/templates/factorial.cpp
@@ -0,0 +1,22 @@
+// Taken from https://en.wikipedia.org/wiki/Template_metaprogramming
+
+#include <iostream>
+
+template<long long N>
+class factorial {
+public:
+	static constexpr long long value = N * factorial<N-1>::value;
+};
+
+template<>
+class factorial<0> {
+public:
+	static constexpr long long value = 1;
+};
+
+int main() {
+	constexpr long long X = 12;
+	std::cout << factorial<X>::value << std::endl;
+
+	return 0;
+}
-- 
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