close
int main()
{
 unsigned int year;
 cout<<"請輸入西元年份，若輸入0則結束:";
 cin>>year;
 while (year != 0)
 {
  if (year%4 != 0)
   cout<<year<<"年不是閏年";
  else if (year%100 == 0)
  {
   if (year%400 == 0)
    cout<<year<<"年是閏年";
   else
    cout<<year<<"年不是閏年";
  }
  else
   cout<<year<<"年是閏年";
  cout<<"\n請輸入西元年份，若輸入0則結束:";
  cin>>year;
 }
 return 0;
}
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