#include <stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>
int is_leap(int year);
void fun(int year, int month, int day);
int main(void)
{
int year, month, day;
puts("请输入年月日:格式为:年,月,日(2015,12,10)");
scanf("%d,%d,%d", &year, &month, &day);
fun( year, month, day);
return 0;
}
// printf("\n");
int is_leap(int year)
{
if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) {
return 1;
}
else {
return 0;
}
}
void fun(int year, int month, int day)
{
int days[13] = { 0,31,is_leap(year) ? 29 : 28,31,30,31,30,31,31,30,31,30,31 },sum=0;
for (int i = 1; i < month; i++) {
sum += days[i];
}
printf("这是%d年的第%d天\n", year, sum + day);
#include <stdio.h>
int main()
{
int day,month,year,sum,leap;
printf("\n请输入年、月、日,格式为:年,月,日(2015,12,10)\n");
scanf("%d,%d,%d",&year,&month,&day); // 格式为:2015,12,10
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:printf("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++;
}
printf("这是这一年的第 %d 天。",sum);
printf("\n");
}
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