编辑器
public class Main { public static void main(String[] args) { int peopleInRoom = 0; // 3 people enter peopleInRoom++; peopleInRoom++; peopleInRoom++; System.out.println(peopleInRoom); // 3 // 1 person leaves peopleInRoom--; System.out.println(peopleInRoom); // 2 } }
3
2
编辑器