2964:日历问题-poj

2964:日历问题

总时间限制: 
1000ms
 
内存限制: 
65536kB
描述
在我们现在使用的日历中, 闰年被定义为能被4整除的年份,但是能被100整除而不能被400整除的年是例外,它们不是闰年。例如:1700, 1800, 1900 和 2100 不是闰年,而 1600, 2000 和 2400是闰年。 给定从公元2000年1月1日开始逝去的天数,你的任务是给出这一天是哪年哪月哪日星期几。
输入
输入包含若干行,每行包含一个正整数,表示从2000年1月1日开始逝去的天数。输入最后一行是−1, 不必处理。可以假设结果的年份不会超过9999。
输出
对每个测试样例,输出一行,该行包含对应的日期和星期几。格式为“YYYY-MM-DD DayOfWeek”, 其中 “DayOfWeek” 必须是下面中的一个: "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday" 或 "Saturday“。
样例输入
1730 
1740 
1750 
1751 
-1
样例输出
2004-09-26 Sunday 
2004-10-06 Wednesday 
2004-10-16 Saturday 
2004-10-17 Sunday
提示
2000.1.1. 是星期六
这题目有好几种思路可解决,只是我从天数开始递减,得到年月日,结果能通过一部分,没找到问题出在哪了。
贴了两个代码。还比较好理解:
代码:
第一个代码是我自己写的,之前提交了一个没通过,还以为这题有毒,还有,我把之前的月份计算改为下标递增求解,测试数据结果都是一样的,但都是AC 不了,也没找出问题。
#include<iostream>
#include<stdio.h>
using namespace std;
int days_of_year[2]={365,366};
int days_of_month[24]={31,28,31,30,31,30,31,31,30,31,30,31,/**/31,29,31,30,31,30,31,31,30,31,30,31};
char week[7][20]={"Saturday","Sunday","Monday","Tuesday","Wednesday","Thursday","Friday"};
int isleapyear(int year)
{
    if(year%400==0||(year%4==0&&year%100!=0))
        return 1;
    else
        return 0;
}
int main()
{
    int m_days;//距离天数
    int weekday;//定义标记当前是星期几

    while(true)
    {
        scanf("%d",&m_days);
        weekday=m_days%7;
        int start_year=2000,start_month=1,start_day=1;//定义当前的年月日,随着天数的增加,依次递增,最后达到所要的年份月份日期
        if(m_days==-1)
        {
            break;
        }
        weekday=m_days%7;
        while(m_days>=days_of_year[isleapyear(start_year)])//计算年
        {
            m_days-=days_of_year[isleapyear(start_year)];
            start_year++;
        }
        while(m_days>=days_of_month[isleapyear(start_year)*12+start_month-1])//计算月
        {
            m_days-=days_of_month[isleapyear(start_year)*12+start_month-1];
                start_month++;
        }
        start_day=start_day+m_days;//计算天,这个是年月计算后剩下的天数
        printf("%d-%02d-%02d %s
",start_year,start_month,start_day,week[weekday]);
    }

    return 0;
}
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cstring>

using namespace std;

int days_of_year[2] = {365,366};
int days_of_month[24] = {31,28,31,30,31,30,31,31,30,31,30,31,/**/31,29,31,30,31,30,31,31,30,31,30,31};
char days_of_week[7][20] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday" ,"Saturday"};

int main()
{
     int day;
     int start_year,start_month,start_day,start_week;
    int is_leap_year;
     while(scanf("%d",&day),day!=-1)
     {
        start_year = 2000;
        start_month = 1;
        start_day = 1;
        start_week = 6;
        
        
        start_week = (start_week + day) % 7;
        
        //判断是否闰年
        if(start_year % 4 == 0 && !(start_year % 100 == 0 && start_year % 400 != 0))
        {
            is_leap_year = 1;
        }
        else
        {
            is_leap_year = 0;
        }
        
        while(day >= days_of_year[is_leap_year])
        {
            start_year ++;
            day -= days_of_year[is_leap_year];
            
            //判断是否闰年
            if(start_year % 4 == 0 && !(start_year % 100 == 0 && start_year % 400 != 0))
            {
                is_leap_year = 1;
            }
            else
            {
                is_leap_year = 0;
            }
        }
        
        while(day >= days_of_month[is_leap_year*12 + start_month - 1])
        {    
            day -= days_of_month[is_leap_year*12 + start_month - 1];
            start_month ++;
        }
        
        start_day += day;
        
        
        printf("%d-%02d-%02d %s
",start_year,start_month,start_day,days_of_week[start_week]);
     }
     return 0;
}

代码二:

#include <stdio.h>
int judgeyear(int);
int main()
{
    long days;
    int i,j;
    int mon[2][13]={{0,31,28,31,30,31,30,31,31,30,31,30,31},{0,31,29,31,30,31,30,31,31,30,31,30,31}};
    int year[2]={365,366};
    char day[7][10]={"Saturday","Sunday","Monday","Tuesday","Wednesday","Thursday","Friday"};
    int dow;
    while(scanf("%ld",&days),days!=-1)
    {
        dow=days%7;
        days+=1;
        for(i=2000 ; (days-year[judgeyear(i)])>0 ; i++)
            days-=year[judgeyear(i)];
        int t=judgeyear(i);
        for(j=1 ; (days-mon[t][j])>0 ; j++)
            days-=mon[t][j];
        printf("%d-%02d-%02ld %s
",i,j,days,day[dow]);
    }
    return 0;
}

int judgeyear(int a)
{
    if(a%4!=0 || (a%100 == 0 && a%400 !=0))
        return 0;
    else
        return 1;
}
View Code
以大多数人努力程度之低,根本轮不到去拼天赋~
原文地址:https://www.cnblogs.com/gcter/p/7372581.html