#include<stdio.h>
#include<stdlib.h>
int main()
{
    int a[12]={31,28,31,30,31,30,31,31,30,31,30,31},b,c,d,e,i,f;
   while(scanf("%d %d %d",&b,&c,&d)!=EOF)
    {e=0;
    for(i=0;i<(c-1);i++)
       e=a[i]+e;
       e=e+d;
       f=e+1;
    if(b%4==0&&b%100!=0||b%400==0&&c>=3)
       printf("%d\n",f);
       else
       printf("%d\n",e);}
       return 0;    }

给个网址

http://acm.hdu.

#include<stdio.h>

int flag;

int leapyear(int year);
int countday(int month,int day);

int main()
{
    int year,month,day;
    printf("please enter the data:\n");
    scanf("%d%d%d",&year,&month,&day);
    leapyear(year);//判断是否为闰年
    countday(month,day);
       return 0;
}

int leapyear(int year)
{
    if(year%400==0||(year%4==0&&year%100!=0))
        flag=1;
    else
        flag=0;
    return 0;
}
int countday(int month,int day)
{
    int s=0;
    if(flag==1)
    {
      int a[12]={31,29,31,30,31,30,31,31,30,31,30,31};
          for(int i=0;i<month-1;i++)
             s=s+a[i];
    }
    else if(flag==0)
    {
       int a[12]={31,28,31,30,31,30,31,31,30,31,30,31};
           for(int i=0;i<month-1;i++)
              s=s+a[i];
    }
        s=s+day;
        printf("%d\n",s);
    return 0;
}

可以把我的程序改下吗？我再dev c++上是可以运行正确的，不知道为什么总是出错！