C语言实现万年历

#include <stdio.h> #include <stdlib.h> #include <time.h> #include<conio.h> typedef struct today {  int day;  int month;  int year; } today;  int day_cankao[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} }; char *week[]= {  "Sun","Mon","Tue","Wen","Thu","Fir","Sat" }; struct tm *todayuse;//struct tm定义c语言中time的结构体 today today_current; int getweekday(today today_usenow) {  // w = y + [y/4] + [ c/4 ]  2c+ [13 * (m+1) / 5] + d  1  //其中，c是年份的前两位，y是年份的后两位，m是月份，d是日期，这里需要注意的是，如果是1月和2月，c和y需要按照上一年来取值。  int w=0;   int year=today_usenow.year;  int month=today_usenow.month;  if(today_usenow.month==1 || today_usenow.month==2)  {  month+=12;  year--;  }  int y=year%100;  int c=year/100;  int m=month;   w=y + y/4 + c/4 - 2*c+ 26* (m+1) / 10 + today_usenow.day -1;  while(w<0)  {  w+=7;  }  return (w%7);  } int is_leap(int year) {   if( (year%4==0 && year%100!=0) || (year%400==0))  {  return 1;  }  else  return 0; } int getmonthdays(int year,int month) {  return day_cankao[is_leap(year)][month]; }   void print_calendar(today today_usenow) {  printf("---------------------------/n");  printf("Sun Mon Tue Wen Thu Fir Sat/n");  int firstday=0;  today today_usehere=today_usenow;  today_usehere.day=1;  int day=getweekday(today_usehere);//日期前  //int daysuseafter  int days=getmonthdays(today_usenow.year,today_usenow.month);//月总数  // 0 1 2 3 4 5 6 // 6  int daysbefore=0;  if((today_usenow.month-1)==0)  {  //现在为1月，去年的十二月份  daysbefore=getmonthdays(today_usenow.year-1,12);  // printf("%d is",daysbefore);  }  else  {    daysbefore=getmonthdays(today_usenow.year,today_usenow.month-1);  }  int daysbefoeit=daysbefore-day+1;  printf("");  int count=1;  if(day==0)  {  daysbefoeit-=7;  for(int i=0;i<day+7;i++)  {     printf("%d ", daysbefoeit);   daysbefoeit++;    }  printf("/n");  count=7;  }  else  {  for(int i=0;i<day;i++)  {   printf("%d ", daysbefoeit);   daysbefoeit++;  }  count=day;  }  int m=1;  for(int i=0;i<=6-day;i++)  {  if(m<10)  {   printf(" %d ",m);  }  else  {     printf("%d ",m);  }   m++;  }  printf("/n");  if(day==0)  {  count=14;  }  else  {  count=7;  }  int hang=0;  while(m<=days)  {  if(m<10)  {   printf(" %d ",m);  }  else  {     printf("%d ",m);  }  hang++;  if(hang==7)  {   printf("/n");   hang=0;  }   m++;  }  if(day==0)  {  count=days+7;  }  else  {  count=day+days;  }  int newmonth=1;  for(int j=hang;j<7;j++)  {   if(newmonth<10)  {  printf(" %d ",newmonth);  }  else  {    printf("%d ",newmonth);  }   newmonth++;  }  printf("/n");  count=count+7-hang;  for(int j=0;j< 42-count;j++)  {  if(newmonth<10)  {  printf(" %d ",newmonth);  }  else  {    printf("%d ",newmonth);  }  newmonth++;  }   } //int getmonth  int main() {  time_t timep;  struct tm *p;  time(&timep);  p =localtime(&timep); //此函数获得的tm结构体的时间，是已经进行过时区转化为本地时间  //p = gmtime(&timep); //把日期和时间转换为格林威治(GMT)时间的函数   /*printf("Year: %d/n", 1900+p->tm_year);  printf("Month: %d/n", 1+p->tm_mon);  printf("Day: %d/n", p->tm_mday);  printf("Hour: %d/n", p->tm_hour);  printf("Minute: %d/n", p->tm_min);  printf("Second: %d/n", p->tm_sec);  printf("Weekday: %d/n", p->tm_wday);  printf("Days: %d/n", p->tm_yday);  printf("Isdst: %d/n", p->tm_isdst);  */   //printf("%d",day_cankao[0][12]);  today_current.year=1900+p->tm_year;  today_current.month=1+p->tm_mon;  today_current.day= p->tm_mday;  today use=today_current;  int c1,c2;  printf(" %d 年 %d 月 %d 日/n",today_current.year,today_current.month,today_current.day);  print_calendar(today_current);  while(1)  {  c1 = getch();  if(c1==27)  {  printf("您已经退出系统");  break;  }  if(c1==110)  {  printf(" %d 年 %d 月 %d 日/n",today_current.year,today_current.month,today_current.day);  //printf("%d /n",getweekday(today_current));   print_calendar(today_current);  use=today_current;  continue;  }  c2 = getch();  //printf( "%d %d",c1,c2);   if(c1==224 && c2==72)  {  use.month+=1;  if(use.month==13)  {  use.month=1;  use.year+=1;  }  printf(" %d 年 %d 月 %d 日/n",use.year,use.month,use.day);  //printf("%d /n",getweekday(today_current));   print_calendar(use);   }  if(c1==224 && c2==80)  {  use.month-=1;  if(use.month==0)  {  use.month=12;  use.year-=1;  }  printf(" %d 年 %d 月 %d 日/n",use.year,use.month,use.day);  //printf("%d /n",getweekday(today_current));   print_calendar(use);  }  if(c1==224 && c2==75)  {  use.year-=1;  printf(" %d 年 %d 月 %d 日/n",use.year,use.month,use.day);  //printf("%d /n",getweekday(today_current));   print_calendar(use);  }  if(c1==224 && c2==77)  {  use.year+=1;  printf(" %d 年 %d 月 %d 日/n",use.year,use.month,use.day);  //printf("%d /n",getweekday(today_current));   print_calendar(use);  }  printf("/n");  printf("按上下按钮，进行月份变换/n");  printf("按左右按钮，进行年份变换/n");  printf("按ESC按键，退出系统/n");  printf("按N按钮，查看当前日期/n");  }  //上 224 72  //下 224 80  //左 224 75  //右 224 77  //esc 27  // n 110   return 0; }