/*
 *文件名 ex_3_2_3.java
 *說  明:演示if-else-if階梯
 */
class ex_3_2_3
{
	public static void main(String args[])
	{
		int month = 4; // 四月
		String season;
		if(month == 12 || month == 1 || month == 2)
			season = "冬天";
		else if(month == 3 || month == 4 || month == 5)
			season = "春天";
		else if(month == 6 || month == 7 || month == 8)
			season = "夏天";
		else if(month == 9 || month == 10 || month == 11)
			season = "秋天";
		else
			season = "不存在的月份";
		System.out.println("四月是" + season + ".");
	}
}