Added a missing new line

input_resolver.cpp

@@ -80,6 +80,10 @@ Command resolveCommand()
         {
             operation = c;
         }
+        else
+        {
+            operation = '+';
+        }
     }
 
     return {shouldQuit, operation, validation_result.next_arg(), shouldPrint};

main.cpp

@@ -12,7 +12,7 @@ int main()
 
     while (true)
     {
-        std::cout << "What's your next input? (+,-,*,/,%,$,q,p)";
+        std::cout << "What's your next input? (+,-,*,/,%,$,q,p)" << std::endl;
         auto command = resolveCommand();
 
         if (command.shouldTerminate())