ymd.zip_ymd年月日

#include<iostream> using namespace std; int main() { int year,month,day; cout<<"本程序时间取值范围为1900年1月1日~未来！"<<endl; //星期一 cout<<"输入年月日："<<endl;cin>>year>>month>>day; int ty=year-1900,tm=month-1,dayl=day-1; dayl+=(ty/4)*(365*3+366); switch(ty%4) {case 3:dayl+=365;case 2:dayl+=365;case 1:dayl+=365;break;default:break;}; switch(tm) { case 11:dayl+=30;case 10:dayl+=31;case 9:dayl+=30; case 8:dayl+=31;case 7:dayl+=31;case 6:dayl+=30; case 5:dayl+=31;case 4:dayl+=30;case 3:dayl+=31; case 2:{if(ty%100!=0&&ty%4==0 ||ty%400==0) dayl+=29;else dayl+=28;}; case 1:dayl+=31;break;default:break;}; switch(dayl%7) {case 1:cout<<"星期二";break;case 2:cout<<"星期三";break;case 3:cout<<"星期四";break; case 4:cout<<"星期五";break;case 5:cout<<"星期六";break;case 6:cout<<"星期日";break; case 0:cout<<"星期一";break;} }