From 1b96219fd5e6cff2ebd8737f99aa3d21a826cf26 Mon Sep 17 00:00:00 2001
From: fdai7848 <jan.heidekrueger@informatik.hs-fulda.de>
Date: Tue, 30 Jan 2024 09:15:31 +0100
Subject: [PATCH] add a temporary faculty function

---
 src/exponent.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/src/exponent.c b/src/exponent.c
index 3f4895a..e82de4e 100644
--- a/src/exponent.c
+++ b/src/exponent.c
@@ -1,4 +1,5 @@
 #include <stdio.h>
+#include <limits.h>
 
 #include "exponent.h"
 
@@ -24,4 +25,17 @@ double expIN(double e, double num){
         }   
     }
     return 0;
-}
\ No newline at end of file
+}
+
+unsigned long long fac(int x){
+    unsigned long long prod = 1;
+    if(x==0) return 1;
+    for (int i = 1; i <= x; i++){
+        if (prod > ULLONG_MAX / i){
+            break;
+        }
+        prod*=i;
+    }
+    return prod;
+}
+