C语言

2.中国有句俗话叫”三天打鱼,两天晒网”.某人从1990年1月1日起开始”三天打鱼两天晒网”,问这个人在以后的某一天中是”打鱼”还是”晒网”?

 

代码 : 

#include <stdio.h>

struct data{
int year;
int month;
int day;
};   //定义一个结构体记录年月日

typedef struct data Data;  //结构体重命名

int runyear(int year)  //是否闰年
{
if((year % 4 == 0 && year % 100 != 0) || year % 400 == 0)
  return 1;
else
  return 0;
}

int countday(Data today) //计算总日期
{
int month[13]={0,31,28,31,30,31,30,31,31,30,31,30,31,30};//13个元素保持下标和月份一致
int total = 0,year,i;

for(year = 0;year <= today.year;year++) //计算年份中有无闰年
{
    if(runyear(year))
       total += 366;
    else 
       total +=365;
}

if(runyear(today.year))  //闰年2月份29天
    month[2]++;
for(i = 1;i < today.month;i++)
{
    total += month[i];
}

return total + today.day; //返回总日期
}

int main( )
{
Data today;
int total,result;

printf(“请输入日期:(格式1990 1 1)\n”);
scanf(“%d%d%d”,&today.year,&today.month,&today.day);

total = countday(today);
result = total % 5;

if(result > 0 && result < 4)
   printf(“这天打鱼\n”);
else
   printf(“这天晒网\n”);

    return 0;
}