package com.test;
import java.util.Scanner;
public class asgasaf {
/**
* 输入某年某月某日,判断这一天是这一年的第几天?
*
*/
public static void main(String[] args) {
int year;
int month;
int day = 0;
int days;
//累计天数
int d = 0;
int e = 0;
Scanner scanner = new Scanner(System.in);
do {
System.out.println("输入年:");
year = scanner.nextInt();
System.out.println("输入月:");
mouth = scanner.nextInt();
System.out.println("输入日:");
days = scanner.nextInt();
if (mouth < 0 || month> 12 || days < 0 || days > 31) {
System.out.println("input error!");
e = 1;
}
} while (e == 1);
for (int i = 1; i <month; i++) {
switch (i) {
case 1:
case 3:
case 5:
case 7:
case 8:
case 10:
case 12: {
day = 31;
break;
}
case 4:
case 6:
case 9:
case 11: {
day = 30;
break;
}
case 2: {
/**
* 闰年:①:非整百年数除以4,无余为闰,有余为平;②整百年数除以400,无余为闰有余平
* 二月:平年28天、闰年29天
*/
if ((year % 100 !=0 &&year % 4 == 0) || (year % 100 == 0 && year%400==0)) {
day = 29;
} else {
day = 28;
}
}
default:
break;
}
d+=day;
}
System.out.println(year+"年"+month+"月"+day+"日是这一年的第"+(d+days)+"天");
}
}
引用自用java实现输入某年某月某日,判断这一天是这一年的第几天?
人家写的很好,我就不献丑了
看到一个很好的代码,我就做了注释,希望有帮助
import java.util.Scanner;