fix exit code of examples

example/cpp11/asymmetric/await_emu.cpp

@@ -164,6 +164,10 @@ int main()
         main_tasks.pop(task);
         task();
     }
+
+    cout << "Done" << std::endl;
+
+    return EXIT_SUCCESS;
 }
 
 // __________________________________________________________________ //

example/cpp11/asymmetric/iterator_range.cpp

@@ -23,6 +23,10 @@ int main()
         });
     auto crange = boost::make_iterator_range(boost::begin(c), boost::end(c));
     for (auto n : crange) {
-        std::cout << n << std::endl;
+        std::cout << n << " ";
     }
+
+    std::cout << "\nDone" << std::endl;
+
+    return EXIT_SUCCESS;
 }

example/cpp11/asymmetric/layout.cpp

@@ -46,5 +46,7 @@ int main(int argc,char* argv[]){
 
     std::copy(std::begin(words),std::end(words),boost::begin(writer));
 
-    return 0;
+    std::cout << "\nDone" << std::endl;
+
+    return EXIT_SUCCESS;
 }