JAVA编程:使用switch和if语句算出今天是今年的第几天答://“注意:”闰年平年二月份天数的区别,这里暂时不考虑,能被四整除的就是闰年。package number;public class Dates { public static void main(String[]args){ // TODO Auto-generated method stub int[]month = { 31,30,31,30,31,30,31,31,30,31,30,31 };int a = 7;int b = 6;in...