任意年份万年历-526互联

||//任意年份万年历
#include<stdio.h>
int days[]={0,31,59,90,120,151,181,212,243,273,304,334,365};
int month[]={31,28,31,30,31,30,31,31,30,31,30,31};
char weekday[7][7]={"一","二","三","四","五","六","七"};
int week(int y,int m,int d)
{
int day=0;
day=days[m-1]+d-1;
return (y-1+(y-1)/4-(y-1)/100+(y-1)/400+day)%7;
}
void print()
{
puts("1.Week(查询某天是星期几)");
puts("2.Month(打印某月日历)");
puts("3.Calendar(打印某年日历)");
puts("4.Exit(退出)");
}
void printmonth(int y,int m)
{
int i,j,w;
w=(week(y,m,1)+1)%7;
puts(" SUN MON TUE WED THU FRI SAT");
for(i=1;i<=w;i++)
printf("%5c",' ');
for(j=i;j<i+month[m-1]+(m==2&&(y%4==0&&(y%100)||y%400==0));j++)
{
printf("%5d",j-i+1);
if(j%7==0)
puts("");
}
if((j-1)%7)
puts("");
}
int main()
{
int i,y,m,d,c;
char op[1];
print();
while(scanf("%d",&c)==1)
{
if(c==1)
{
do
{
puts("请输入年月日（XXXX，XX，XX）");
scanf("%d%d%d",&y,&m,&d);
printf("%4.4d年%2.2d月%2.2d日是星期%s，是否继续查询（Y/N）？\n",y,m,d,weekday[week(y,m,d)]);
scanf("%s",op);
}while(op[0]=='Y');
print();
}
if(c==2)
{
do
{
puts("请输入要打印的月份（XXXX）");
scanf("%d%d",&y,&m);
printf(" %4.4d年%2.2d月\n",y,m);
printmonth(y,m);
puts("是否继续打印（Y/N）？");
scanf("%s",op);
}while(op[0]=='Y');
print();
}
if(c==3)
{
do
{
puts("请输入要打印的年份（XXXX）");
scanf("%d",&y);
printf(" %4.4d\n",y);
for(i=1;i<=12;i++)
{
printf(" %2.2d月\n",i);
printmonth(y,i);
}
puts("是否继续打印（Y/N）？");
scanf("%s",op);
}while(op[0]=='Y');
print();
}
if(c==4)
{
puts("是否要真的退出（Y/N）？");
scanf("%s",op);
if(op[0]=='Y')
return 0;
else print();
}
}
}