输入一个日期时间字符串，在控制台根据该时间动态显示时间，并显示是否是闰年，如果整点进行提醒

datetime.cpp

#include <iostream>
#include <cstdlib>
#include <cstdio>
#ifdef WIN32
#include <windows.h>
#else
#include <unistd.h>
#endif //win32

using namespace std;

struct DATETIME {
  int year;
  int month;
  int date;
  int hour;
  int minute;
  int second;
};

void sleepcp(int milliscends);

int main(){
  DATETIME dateTime;
  int isLeapYear = 0;

  cout << "input time with format(yyyy MM dd hh mm ss):";
  cin >> dateTime.year >> dateTime.month >> dateTime.date
      >> dateTime.hour >> dateTime.minute >> dateTime.second;

  while(true){
    #ifdef WIN32
    system("cls");
    #else
    system("clear");
    #endif

    if(dateTime.year % 400 == 0 ||
      (dateTime.year % 4 == 0 && dateTime.year % 100 != 0)){
       isLeapYear = 1;
    }

    dateTime.second++;
    if(dateTime.second == 60){
       dateTime.second = 1;
       dateTime.minute++;
    }

    if(dateTime.minute >= 60){
       dateTime.minute = 0;
       dateTime.hour++;

       cout << "one hour. \7" << endl;
    }
    
    if(dateTime.hour >= 24){
       dateTime.hour = 0;
       
      if((dateTime.month == 1 || dateTime.month == 3 || dateTime.month == 5 ||
          dateTime.month == 7 || dateTime.month == 8 || dateTime.month == 10 ||
          dateTime.month == 12) && dateTime.date == 31){
        dateTime.date = 1;
        dateTime.month++;
      } else if((dateTime.month == 4 || dateTime.month == 6 || dateTime.month == 9 ||
            dateTime.month == 11) && dateTime.date == 30){
         dateTime.date = 1;
         dateTime.month++;
      } else if(dateTime.month == 2 &&
          ((dateTime.date == 28 && isLeapYear == 0) ||
           (dateTime.date == 29 && isLeapYear == 1))){
        dateTime.date = 1;
        dateTime.month++;
      }else{
         dateTime.date++;
      }
    }
    if(dateTime.month >= 12){
       dateTime.month = 1;
       dateTime.year++;
    }

    cout << '\a';
    cout << "DateTime: " << dateTime.year << "-" << dateTime.month << "-" << dateTime.date << " ";
    cout << dateTime.hour << ":" <<  dateTime.minute << ":" << dateTime.second << endl;

    cout << "Leap Year: " << (isLeapYear == 0 ? "No" : "Yes") << endl;

    sleepcp(1000);
  }

  return 0;
}

void sleepcp(int milliseconds){
  #ifdef WIN32
  Sleep(milliseconds);
  #else
  usleep(milliseconds * 1000);
  #endif
}

假设保存文件名为： datetime.cpp ，编译如下。
window：

cl.exe  /DWIN32=1 datetime.cpp

linux:

g++ datetime.cpp -o datetime