”输入某年某月某日，判断这一天是这一年的第几天“用C语言怎样编程

Question

一个C语言编程题目“输入某年某月某日，判断这一天是这一年的第几天？”怎样用C语言编程

Answer 1

#include<stdio.h>
voidmain()
{
intsumday(intmonth,intday);/*计算第多少天的函数声明*/
intleap(intyear);/*判断是否闰年的函数声明*/
intmonth,day,days,year;
intdaytab[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};/*一般年的12个月的天数组成一个数组*/
printf("Pleaseinputdate(year,month,day):");/*提示输入年月日*/
scanf("%d-%d-%d",&year,&month,&day);/*输入年月日*/
printf("%d/%d/%d\n",year,month,day);
days=sumday(month,day);/*计算天数的函数调用*/
if(leap(year)&&month>=3)/*调用判断是否闰年的函数，并且月份大于等于3时天数加1*/
days=days+1;
printf("Todayisthe%ddayofthisyear.",days);/*显示是第多少天的函数*/
}
intsumday(intmonth,intday)
{
intdaytab[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
inti;
for(
i=0;i<month;i++)
day+=daytab[i];
return(day);
}
intleap(intyear)
{
intleap;
leap=(year%4==0&&year%100!=0||year%400==0);
return(leap);
}