編寫程式,對輸入的年、月、日,給出該天是該年的第多少天?
阿新 • • 發佈:2019-01-24
public class TimeOver { public static void mDate(String date){ int dateSum = 0; int year = Integer.valueOf(date.substring(0,4)); int month = Integer.valueOf(date.substring(5,7)); int day = Integer.valueOf(date.substring(8,10)); for(int i=1;i<month;i++){ switch(i){ case 1: case 3: case 5: case 7: case 8: case 10: case 12: dateSum+=31; break; case 4: case 6: case 9: case 11: dateSum+=30; break; case 2: //判斷是否是閏年 if((year % 4 == 0 && year%100 != 0)|| (year % 400 == 0)){ dateSum += 29; }else{ dateSum += 28; } } } System.out.println("您輸入的日期是該年的第:"+(dateSum+day)+"天"); System.out.println("輸入exit退出系統"); } public static void main(String[] args) { while(true){ System.out.println("請輸入年月日(格式2018-07-21)"); Scanner sc = new Scanner(System.in); String str = sc.nextLine(); if(str.equals("exit")){ System.out.println("系統退出"); break; } TimeOver.mDate(str); } } }