java經典程式設計題(13-15)
阿新 • • 發佈:2019-01-25
【程式14】題目:輸入某年某月某日,判斷這一天是這一年的第幾天?
public class Demo1 { public static void main(String[] args) { int day = 0; int month = 0; int year = 0; int sum = 0; int leap; System.out.print("請輸入年,月,日\n"); Scanner input = new Scanner(System.in); year = input.nextInt(); month = input.nextInt(); day = input.nextInt(); // 先計算某月以前月份的總天數 switch (month) { case 1: sum = 0; break; case 2: sum = 31; break; case 3: sum = 59; break; case 4: sum = 90; break; case 5: sum = 120; break; case 6: sum = 151; break; case 7: sum = 181; break; case 8: sum = 212; break; case 9: sum = 243; break; case 10: sum = 273; break; case 11: sum = 304; break; case 12: sum = 334; break; default: System.out.println("data error"); break; } sum = sum + day; //再加上某天的天數 //判斷是不是閏年 if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0)) leap = 1; else leap = 0; // 如果是閏年且月份大於2,總天數應該加一天 if (leap == 1 && month > 2) sum++; System.out.println("It is the the day:" + sum); } }
【執行結果】
請輸入年,月,日
2014
3
5
It is the the day:64