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859天前import java.util.*; |
/** |
* 判断某日期是这一年的第几天 |
* |
*/ |
public class Demo { |
public static void main(String[] args) { |
int day = 0; |
int month = 0; |
int year = 0; |
int sum = 0; |
int leap; |
System.out.print("请输入年 月 日 （使用空格分开）\n"); |
Scanner input = new Scanner(System.in); |
year = input.nextInt(); |
month = input.nextInt(); |
day = input.nextInt(); |
switch (month) /* 先计算某月以前月份的总天数 */ |
{ |
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; /* 再加上某天的天数 */ |
if (year % 400 == 0 || (year % 4 == 0 && year % 100 != 0))/* 判断是不是闰年 */ |
leap = 1; |
else |
leap = 0; |
if (leap == 1 && month > 2)/* 如果是闰年且月份大于2,总天数应该加一天 */ |
sum++; |
System.out.println("It is the the day:" + sum); |
} |
} |
