f0801.cpp

it is a usefull thing

//==================================
// f0801.cpp
// 日期结构
//==================================
#include<iostream>
#include<iomanip>
using namespace std;
//----------------------------------
struct Date{
  int year;
  int month;
  int day;
};//-------------------------------
void print(Date);
bool isLeapYear(Date d);
//---------------------------------
int main(){
  Date d;
  d.year = 2000;
  d.month = 12;
  d.day = 6;
  if(isLeapYear(d))
    print(d);
}//--------------------------------
void print(Date s){
  cout.fill('0');
  cout<<setw(4)<<s.year<<'-'<<setw(2)<<s.month<<'-'<<setw(2)<<s.day<<'\n';
  cout.fill(' ');
}//--------------------------------
bool isLeapYear(Date d){
  return (d.year % 4==0 && d.year % 100!=0)||(d.year % 400==0);
}//================================