用C语言编写万历,详细代码

/* welcome to use the WanNianLi system! */

#include

#include

#include

char* month_str[]={"January","February","March","April","May","June","July","August","September","October","November","December"};

char* week[]={"Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"};

int leap (int year)//判断闰年

{

if(year%4==0&&year%100!=0||year%400==0)

return 1;

else return 0;

}

int month_day(int year,int month) //判断这一个月有多少天

{

int mon_day[]={31,28,31,30,31,30,31,31,30,31,30,31}; //初始化每个月的天数

if(leap(year)&&month==2 )

return 29;

else

return(mon_day[month-1]);

}

int firstday(int year,int month,int day)//判断这一个月的第一天是星期几

{

int c=0;

float s;

int m;

for(m=1;m

c=c+month_day(year,m);

c=c+day;

s=year-1+(float)(year-1)/4+(float)(year-1)/100+(float)(year-1)/400-40+c;

return ((int)s%7);

}

int PrintAllYear(int year)/*print the all year*/

{

int a,b;

int i,j=1,n=1,k;

printf("\n\n**************%d年的挂历**************\n",year);

for(k=1;k<=12;k++)

{

j=1,n=1;

b=month_day(year,k);

a=firstday(year,k,1);

printf("\n\n%s(%d)\n",month_str[k-1],k);

printf(" Sun Mon Tue Wed Thu Fri Sat \n**************");

if(a==7)

{

for(i=1;i<=b;i++)

{

printf("%4d",i);

if(i%7==0)

{

printf("**************\n**************");

}

}

}

if(a!=7)

{

while (j<=4*a)

{

printf(" ");

j++;

}

for(i=1;i<=b;i++)

{

printf("%4d",i);

if(i==7*n-a)

{

printf("**************\n**************");

n++;

}

}

}

printf("**************\n");

}

return 1;

}

//****************************************************

int main()

{

int option,da;

char ch;

int year,month,day;

printf("Copyright @ 2005 TianQian All rights reserved!:):):)");

printf("\n\nWelcome to use the WanNianLi system!\n");

//调用系统时间

time_t tval;

struct tm *now;

tval = time(NULL);

now = localtime(&tval);

printf("现在时间: %4d年 %d月 %02d日 %d:%02d:%02d\