九度题目1043

#include<stdio.h>
#include<string.h>
#define run(x) x%100!=0&&x%4==0||x%400==0?1:0
int daysofmonth[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
};
struct Date{
       int Day,Month,Year;
  void nextday(){
        Day++;
if(Day>daysofmonth[Month][run(Year)]){
      Day=1;
  Month++;
  if(Month>12){
      Month=1;
  Year++;
  }
}
  }
};
int buf[3001][13][32];
char month[13][20]={
       "",
  "January",
  "February",
  "March",
  "April",
  "May",
  "June",
  "July",
  "August",
  "September",
  "October",
  "November",
  "December"
};
char dayofweek[7][20]={
       "Sunday",
  "Monday",
  "Tuesday",
  "Wednesday",
  "Thursday",
  "Friday",
  "Saturday"
};
int main(){
    int cnt=0;   
Date a;
a.Day=1;
a.Month=1;
a.Year=0;
while(a.Year<3001){
    buf[a.Year][a.Month][a.Day]=cnt; 
a.nextday();
cnt++;
}
int d,m,y;
char ms[20];
while(scanf("%d%s%d",&d,&ms,&y)!=EOF){
for(m=1;m<=12;m++){
if(strcmp(ms,month[m])==0){
break;
} 
}
int n=buf[y][m][d]-buf[2016][2][21];
   n=n+0;
puts(dayofweek[(n%7+7)%7]);
}
return 0;

}

注意：

1.判断两个字符串是否相同，使用strcmp（a,b）==0

2.for循环里面的if中写break

3.(n%7+7)%7保证下标为正 且兼顾了日期在前在后的问题

4.puts函数的使用，就是用来输出字符串的，且换行，等效于printf（“%s\n”,s）

5.注意引用时候名称的正确拼写