class Test2_Switch {
	public static void main(String[] args) {
			//A,看程序写结果
			/*
			int x = 2;
			int y = 3;
			switch(x){
				default:
					y++;
					break;
				case 3:
					y++;
				case 4:
					y++;
			}
			//y在default处+1变为4
			System.out.println("y="+y);

			*/
			
			//b.看程序写结果
			int x = 2;
			int y = 3;
			switch(x){
				default:
					y++;
				case 3:
					y++;
				case 4:
					y++;
			}
			//因为没有break隔断符,Y加了三次 1 变为 6
			System.out.println("y="+y);






	}
}