From 045db2abec41ea948aab26b91bce99d5d8acf9b1 Mon Sep 17 00:00:00 2001
From: joachimschmidt557 <joachim.schmidt557@outlook.com>
Date: Mon, 11 Mar 2019 21:12:13 +0100
Subject: [PATCH] Make add, sub, mul handle no arguments

---
 add.nim | 3 ++-
 mul.nim | 3 ++-
 sub.nim | 3 ++-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/add.nim b/add.nim
index 7d01b92..5d5b108 100644
--- a/add.nim
+++ b/add.nim
@@ -2,6 +2,7 @@ import cligen, sequtils
 import common
 
 proc main(integers:seq[int]) =
-    echo integers.foldl(a + b)
+    if integers.len > 0:
+        echo integers.foldl(a + b)
 
 dispatch(main, version=("version", nimbaseVersion))
diff --git a/mul.nim b/mul.nim
index c931f86..c7f1246 100644
--- a/mul.nim
+++ b/mul.nim
@@ -2,6 +2,7 @@ import cligen, sequtils
 import common
 
 proc main(integers:seq[int]) =
-    echo integers.foldl(a * b)
+    if integers > 0:
+        echo integers.foldl(a * b)
 
 dispatch(main, version=("version", nimbaseVersion))
diff --git a/sub.nim b/sub.nim
index ba34c8e..6f4a29d 100644
--- a/sub.nim
+++ b/sub.nim
@@ -2,6 +2,7 @@ import cligen, sequtils
 import common
 
 proc main(integers:seq[int]) =
-    echo integers.foldl(a - b)
+    if integers > 0:
+        echo integers.foldl(a - b)
 
 dispatch(main, version=("version", nimbaseVersion))