题解 | #日期类#

#include <iostream>
using namespace std;
int main() {
    int n;cin>>n;
    while(n--){
        int year,month,day;
        cin>>year>>month>>day;
        int arr[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};
        if(year %400==0 || ((year%100 !=0)&&(year%4 == 0))){
            arr[2]++;
        }
        if(++day>arr[month]){
            day = 1;
            month++;
            if(month>12){
                month=1;
                year++;
            }
        }
        cout<<year<<"-";
        cout<<(month>=10?to_string(month):"0"+to_string(month))<<"-";
        cout<<(day>=10?to_string(day):"0"+to_string(day))<<endl;
    }
}
// 64 位输出请用 printf("%lld")

qd