C语言编程:给定一个日期（年/月/日）计算该日期是所在年的第几天。

Question

如题所述

Answer 1

//1.程序分析：以3月5日为例，应该先把前两个月的加起来，然后再加上5天即本年的第几天，特殊
//情况，闰年且输入月份大于3时需考虑多加一天。
#include<stdio.h>
void
main(){
int
year,month,day,i,leap;
int
fleap(int
a);
printf("请输入年月日如（2009,1,1）：");
scanf("%d,%d,%d",&year,&month,&day);
//printf("%d,%d,%d\n",year,month,day);
switch(month){
case
1:i=0;break;
case
2:i=31;break;
case
3:i=31+28;break;
case
4:i=31+28+31;break;
case
5:i=31+28+31+30;break;
case
6:i=31+28+31+30+31;break;
case
7:i=31+28+31+30+31+30;break;
case
8:i=31+28+31+30+31+30+31;break;
case
9:i=31+28+31+30+31+30+31+31;break;
case
10:i=31+28+31+30+31+30+31+31+30;break;
case
11:i=31+28+31+30+31+30+31+31+30+31;break;
case
12:i=31+28+31+30+31+30+31+31+30+31+30;break;}
leap=fleap(year);
if(leap==1)
{
i=i+day+1;
printf("\n\n\n\n\n
%d年是润年\n",year);}
else
{i=i+day;printf("\n\n\n\n\n
%d年不是润年\n",year);}
printf("%d年%d月%d是%d年的第%d天",year,month,day,year,i);
getch();}
int
fleap(int
a){
int
leap;
if(a%4==0)
{
if(a%100==0)
{
if(a%400==0)
leap=1;
else
leap=0;
}else
leap=1;
}
else
leap=0;
return(leap);}//判断润年的