add CLI params

main.cpp

@@ -1,9 +1,14 @@
 #include <MyThreadPool.h>
 #include <iostream>
+#include <string>
 
-int main()
+int main(int argc, char* argv[])
 {
-    MyThreadPool::ThreadPool tp(4);
+    size_t threadCount = 0;
+    if (argc > 1) {
+        threadCount = std::stoul(argv[1]);
+    }
+    MyThreadPool::ThreadPool tp(threadCount);
 
     auto task = [](int i) {
         std::this_thread::sleep_for(std::chrono::milliseconds(500));