C语言实现的万年历显示，按下上下左右按键来更换日期和年份，供大家参考，具体内容如下
#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;
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持呐喊教程。
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