add difference

main.cpp

@@ -7,6 +7,7 @@ int main()
     cout << "Enter A and B: ";
 int a, b;
 cin >> a >> b;
-cout << "A + B = " << a + b
+cout << "A + B = " << a + b << '\n'
+     << "A - B = " << a - b << '\n';
     return 0;
 }