判断某年是否为闰年

#include<iostream>

using namespace std;

int main()

{
int year;
cin >> year;
while (year>0)
{
if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
{
cout << year << "年为闰年！" << endl;
}
else
{
cout << year << "年不是闰年！" << endl;
}
cin >> year;
}

system("pause");

return  0;
}

--------------------------------------------

#include<iostream>

using namespace std;

int main()

{
int year;
bool isleapyear;
cin >> year;
while (year>0)
{
isleapyear = ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0));
if (isleapyear)
{
cout << year << "年为闰年！" << endl;
}
else
{
cout << year << "年不是闰年！" << endl;
}
cin >> year;
}
system("pause");
return  0;

}