From 7f2f87f3f1cc00bd16d1d5552cc126e9aabc3531 Mon Sep 17 00:00:00 2001
From: crupest <crupest@outlook.com>
Date: Sat, 12 Jun 2021 23:20:15 +0800
Subject: ...

---
 operating-system-experiment/ParallelCalculationDemo.cpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'operating-system-experiment/ParallelCalculationDemo.cpp')

diff --git a/operating-system-experiment/ParallelCalculationDemo.cpp b/operating-system-experiment/ParallelCalculationDemo.cpp
index 7340da8..0174c55 100644
--- a/operating-system-experiment/ParallelCalculationDemo.cpp
+++ b/operating-system-experiment/ParallelCalculationDemo.cpp
@@ -12,9 +12,11 @@ int main(int argc, char **argv) {
     thread_number = std::atoi(argv[1]);
     if (thread_number <= 0) {
       std::cerr << "Argument must be a positive integer.\n";
+      return -1;
     }
   } else {
     std::cerr << "Too many arguments.\n";
+    return -1;
   }
 
   std::cout << "Use " << thread_number << " threads to calculate sum of 1-" << N
-- 
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