How to implement a response to key combinations?

Question

C++ / C#

How in SFML for two simultaneously pressed keys to perform an action so that actions for each of the keys are not performed separately?

For example:

if (sf::Keyboard::isKeyPressed(sf::Keyboard::S)) {
  function1();
}
if (sf::Keyboard::isKeyPressed(sf::Keyboard::D)) {
  function2();
}

How to call function 3 when s and d are pressed, but without calling function 1 and function 2?

Answer 1

if (S && D) {
  functino3();
} else if (S) {
  function1();
} else if (D) {
  function2();
}