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#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 IsLeapYear(int year) /*find out the year is leap year or not*/

{

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

return 1;

else

return 0;

}

int month_day(int year,int month)

{

int mon_day[]={31,28,31,30,31,30,31,31,30,31,30,31};

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

return 29;

else

return(mon_day[month-1]);

}

int DaySearch(int year,int month,int day) /*search what day this day is*/

{

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 temp;

int i,j;

printf("\n\n%d Calander\n",year);

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

{

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

printf("0 1 2 3 4 5 6 \n");

printf("S M T W T F S \n\n");

temp=DaySearch(year,i,1);

for(j=1;j<=month_day(year,i)+temp;j++)

{

if(j-temp<=0)

printf(" ");

else if(j-temp<10)

printf("%d ",j-temp);

else

printf("%d ",j-temp);

if(j%7==0)

printf("\n");

}

}

return 0;

}

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");

while(1)

{

printf("\nPlease select the service you need:\n");

printf("\n1 Search what day the day is");

printf("\n2 Search whether the year is leap year or not");

printf("\n3 Print the calander of the whole year");

printf("\n4 Exit\n");

scanf("%d",&option);

switch(option)

{

case 1:

while(1)

{

printf("\nPlease input the year,month and day(XXXX,XX,XX):");

scanf("%d,%d,%d,%c",&year,&month,&day);

da=DaySearch(year,month,day);

printf("\n%d-%d-%d is %s,do you want to continue?(Y/N)",year,month,day,week[da]);

fflush(stdin);

scanf("%c",&ch);

if(ch=='N'||ch=='n')

break;

}

break;

case 2:

while(1)

{

printf("\nPlease input the year which needs searched?(XXXX)");

scanf("%d",&year);

if(IsLeapYear(year))

printf("\n%d is Leap year,do you want to continue?(Y/N)",year);

else

printf("\n%d is not Leap year,do you want to continue(Y/N)?",year);

fflush(stdin);

scanf("%c",&ch);

if(ch=='N'||ch=='n')

break;

}

break;

case 3:

while(1)

{

printf("\nPlease input the year which needs printed(XXXX)");

scanf("%d",&year);

PrintAllYear(year);

printf("\nDo you want to continue to print(Y/N)?");

fflush(stdin);

scanf("%c",&ch);

if(ch=='N'||ch=='n')

break;

}

break;

case 4:

fflush(stdin);

printf("Are you sure?(Y/N)");

scanf("%c",&ch);

if(ch=='Y'||ch=='y')

exit(0);

break;

default:

printf("\nError:Sorry,there is no this service now!\n");

break;

}

}

return 0;

}