#include"iostream.h"
#include"iomanip.h"
#include"stdlib.h"
leapyear(int a)/*是否是闰年*/
{
if((a%4==0&&a%100!=0)||(a%100==0&&a%400==0))
return (1);
else return (0);
}
int aa[12]={31,28,31,30,31,30,31,31,30,31,30,31};
int cc[12]={31,29,31,30,31,30,31,31,30,31,30,31};
char bb[8][8]={"星期日","星期一","星期二","星期三","星期四","星期五","星期六"};
ww(int a,int b,int c)
{
int n=0,m=0,i,j,k=0;
for(i=1;i<c;i++)
{
if(leapyear(i)==1)
m=m+366;
else m=m+365;
}
for(j=1;j<b;j++)
{if(leapyear(c)==1) k=k+cc[j-1];
else k=k+aa[j-1];
}
n=(m+k+a)%7;
return n;
}
void yuefen(int m)
{
cout<<"最大天数是:";
if(m==2)
cout<<aa[m-1]+1;
else cout<<aa[m-1]<<endl;
}
void nianfen(int n)/*打印年份的日历*/
{
int i,j,k;
if(leapyear(n)==1)
{
for(j=1;j<=12;j++)
{
cout<<j;
cout<<"月份"<<endl;
cout<<" 日"<<" 一"<<" 二"<<" 三"<<" 四"<<" 五"<<" 六"<<endl;
for(i=0;i<ww(1,j,n);i++)
{
cout<<setw(4)<<"";
}
for(k=1;k<=cc[j-1];k++)
{
cout<<setw(4)<<k;
if((ww(1,j,n)+k)%7==0)
cout<<endl;
}
cout<<endl;
}
}
else
{
for(j=1;j<=12;j++)
{
cout<<j;
cout<<"月份"<<endl;
cout<<ww(1,j,n)<<endl;
cout<<endl<<" 日"<<" 一"<<" 二"<<" 三"<<" 四"<<" 五"<<" 六"<<endl;
for(i=0;i<ww(1,j,n);i++)
{
cout<<setw(4)<<"";
}
for(k=1;k<=aa[j-1];k++)
{
cout<<setw(4)<<k;
if((ww(1,j,n)+k)%7==0)
cout<<endl;
}
cout<<endl;
}
}
}
void nianyue(int n,int y)/*打印某年某月的月历*/
{
int i,k;
if(leapyear(n)==1)
{
cout<<" 日"<<" 一"<<" 二"<<" 三"<<" 四"<<" 五"<<" 六"<<endl;
for(i=0;i<ww(1,y,n);i++)
{
cout<<setw(4)<<"";
}
for(k=1;k<=cc[y-1];k++)
{
cout<<setw(4)<<k;
if((ww(1,y,n)+k)%7==0)
cout<<endl;
}
cout<<endl;
}
else
{ cout<<endl<<" 日"<<" 一"<<" 二"<<" 三"<<" 四"<<" 五"<<" 六"<<endl;
for(i=0;i<ww(1,y,n);i++)
{
cout<<setw(4)<<"";
}
for(k=1;k<=aa[y-1];k++)
{
cout<<setw(4)<<k;
if((ww(1,y,n)+k)%7==0)
cout<<endl;
}
cout<<endl;
}
}
void main()
{
int n,m;
int day,month ,year;
while(1)
{
cout<<"***********************************:"<<endl;
cout<<"1查询某年某月某日是星期几"<<endl
<<"2是否为闰年"<<endl
<<"3查询某月的最大天数"<<endl
<<"4打印某年的全年日历"<<endl
<<"5打印某年某月的月历"<<endl
<<"6exit"<<endl
<<"***********************************:"<<endl;
cout<<"请输入要操作的指令:"<<endl;
cin>>n;
switch(n)
{
case 1:cout<<"请输入要查询的日期:";
cout<<"year:";
cin>>year;
cout<<endl<<"month:";
cin>>month;
cout<<endl<<"day:";
cin>>day;
cout<<"星期是:";
cout<<bb[ww(day,month,year)]<<endl;break;
switch(ww(day,month,year))
{
case 1:cout<<"星期一";break;
case 2:cout<<"星期二";break;
case 3:cout<<"星期三";break;
case 4:cout<<"星期四";break;
case 5:cout<<"星期五";break;
case 6:cout<<"星期六";break;
case 7:cout<<"星期日";break;
}
cout<<endl;break;
case 2:cout<<"请输入要查询的年份:";
cin>>m;
if(leapyear(m)==1) cout<<"是闰年"<<endl;
else cout<<"不是闰年，请返回重新输入"<<endl;
break;
case 3:cout<<"请输入月份:";
cin>>m;
yuefen(m);break;
case 4:cout<<"请输入所要打印年份:";
cin>>m;
nianfen(m);break;
case 5:cout<<"请输入年份:";
cin>>n;
cout<<endl<<"请输入月份:";
cin>>m;
cout<<endl;
nianyue(n,m);break;
case 6:exit(0);
}
}
}
