The problem is related in “Date”. After we contacted the basic problem about Date,the other questions will be solved through the basic of Date’s question.
The last time,I writed a Blog about Date,which is named “《How many days between the date to date?》”.we could use the same methods to solve today’s problem.
Thinking:
what day is Date?we need Know:
- what day is today?
- How many days between the today to that days,This problem gived,You need to use
mood 7.
一、Task
二、process of solute
We used the methods ,using the interval of days to solve this problems , in order to show a method of basic Date’s problems .
#include<stdio.h> #include<string.h> #define IsYeap(x) x%100!=0&&x%4==0 ||x%400==0?1:0 int DayOfMonth[13][2]= { 0,0, 31,31, 28,29, 31,31, 30,30, 31,31, 30,30, 31,31, 31,31, 30,30, 31,31, 30,30, 31,31 }; char MonthName[13][20]= { " ", "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" }; char WeekName[7][20]= { "Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday" }; int buf[3001][13][32]; struct Date { int Day; int Month; int Year; void nextDay() { Day++; if(Day>DayOfMonth[Month][IsYeap(Year)]) { Day=1; Month++; if(Month>12) { Month=1; Year++; } } } }; int main() { Date tmp; tmp.Day=1; tmp.Month=1; tmp.Year=0; int cnt=0; while(tmp.Year<3001) { buf[tmp.Year][tmp.Month][tmp.Day]=cnt; cnt++; tmp.nextDay(); } int day,month,year; char Month[20]; while(scanf("%d%s%d",&day,&Month,&year)!=EOF) { for(int i=1;i<13;i++) { if(strcmp(MonthName[i],Month)==0) { month=i; break; } } int k=buf[year][month][day]-buf[2018][12][31]+1; int j=(k%7+7)%7; printf("%s",WeekName[j]); } }
