C语言实现万年历
#include
#include
#include
#include
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("---------------------------
");
printf("Sun Mon Tue Wen Thu Fir Sat
");
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 { printf("%d ", daysbefoeit); daysbefoeit++; } printf(" "); count=7; } else { for(int i=0;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(" "); 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(" "); 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(" "); 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 ", 1900+p->tm_year); printf("Month: %d ", 1+p->tm_mon); printf("Day: %d ", p->tm_mday); printf("Hour: %d ", p->tm_hour); printf("Minute: %d ", p->tm_min); printf("Second: %d ", p->tm_sec); printf("Weekday: %d ", p->tm_wday); printf("Days: %d ", p->tm_yday); printf("Isdst: %d ", 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 ",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 ",today_current.year,today_current.month,today_current.day); //printf("%d ",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 ",use.year,use.month,use.day); //printf("%d ",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 ",use.year,use.month,use.day); //printf("%d ",getweekday(today_current)); print_calendar(use); } if(c1==224 && c2==75) { use.year-=1; printf(" %d 年 %d 月 %d 日 ",use.year,use.month,use.day); //printf("%d ",getweekday(today_current)); print_calendar(use); } if(c1==224 && c2==77) { use.year+=1; printf(" %d 年 %d 月 %d 日 ",use.year,use.month,use.day); //printf("%d ",getweekday(today_current)); print_calendar(use); } printf(" "); printf("按上下按钮，进行月份变换 "); printf("按左右按钮，进行年份变换 "); printf("按ESC按键，退出系统 "); printf("按N按钮，查看当前日期 "); } //上 224 72 //下 224 80 //左 224 75 //右 224 77 //esc 27 // n 110 return 0; }