代码如下：

 1 #include <iostream>
 2 using namespace std;
 3 int main()
 4 {
 5     int a;
 6     cin>>a;
 7     if((a%4==0 &&a%100!=0)||a%400==0)
 8     cout<<a<<" is a leap year";
 9     else cout<<a<<" is not a leap year";
10     return 0;
11  }