日历系统C++源码

#include

#include

#include

class calender

{

public:

int weekday;//星期几

int year;

public:

void setyear();

void printmonthdays();//打印每月的每一天

void printtitle(int month);//打印每月的日历头

int monthdays(int month);//判断每月的天数

int firstday(int year);//计算元旦是星期几

};

void calender::setyear()

{

cout<<"请输入您要查找的年份："<

cin>>year;

}

void calender::printmonthdays()

{

int month,days,i;

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

{

printtitle(month);//打印日历头

days=monthdays(month);

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

{

printf("%5d",i);//右对齐打印

weekday=(weekday+1)%7;

if(weekday==0)

printf("\n ");

}

printf("\n");

}

}

void calender::printtitle(int month)

{

printf("\n%d月日一二三四五六\n",month);

printf(" ");

for(int i=0;i

printf(" ");

}

int calender::monthdays(int month)

{

switch(month)

{

case 1:

case 3:

case 5:

case 7:

case 8:

case 10:

case 12:

return 31;

case 4:

case 6:

case 9:

case 11:

return 30;

case 2:

if((year%4==0 && year%100!=0)||(year%400==0))//判断是否为闰年return 29;

else

return 28;

default: return 0;

}

}

int calender::firstday(int year)

{

double s;

s=floor(year-1+(year-1)/4.0-(year-1)/100.0+(year-1)/400.0+1);//floor表示下取整return (int)s%7;

}

void main()

{

calender cal;

cal.setyear();

//int year;

//cout<<"请输入要查看的年份：\n";

//cin>>year;

cal.weekday=cal.firstday(cal.year);

printf("\n\n %d年\n",cal.year);

cal.printmonthdays();

printf("\n");

}