division and update .gitignore

.gitignore

@@ -1,2 +1,3 @@
 /bin
 /obj
+project.layout

main.cpp

@@ -10,7 +10,8 @@ int main()
     cin >> a >> b;
     cout << "A + B = " << a + b << '\n'
      << "A - B = " << a - b << '\n'
-     << "A * B = " << a * b << '\n';
+     << "A * B = " << a * b << '\n'
+     << "A / B = " << a / b << '\n';
 
     std::cout << "Press 'Enter' for exit...";
     std::cin.ignore(); // èãíîðèðóåì ñèìâîë íîâîé ñòðîêè èç ïðåäûäóùåãî ââîäà