给你一个日期,请你设计一个算法来判断它是对应一周中的哪一天。
输入为三个整数:day、month 和 year,分别表示日、月、年。
您返回的结果必须是这几个值中的一个 {“Sunday”, “Monday”, “Tuesday”, “Wednesday”, “Thursday”, “Friday”, “Saturday”}。
示例 1:
输入:day = 31, month = 8, year = 2019
输出:"Saturday"
示例 2:
输入:day = 18, month = 7, year = 1999
输出:"Sunday"
示例 3:
输入:day = 15, month = 8, year = 1993
输出:"Sunday"
提示:
给出的日期一定是在 1971 到 2100 年之间的有效日期。
代码:
public String dayOfTheWeek(int day, int month, int year) {
String[] s = { "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday","Sunday"};
if (month == 1) {
month = 13;
year--;
}
if (month == 2) {
month = 14;
year--;
}
//基姆拉尔森计算公式
int w = (day + 2 * month + 3 * (month + 1) / 5 + year + year / 4 - year / 100 + year / 400) % 7;
return s[w];
}