C++ 代码

#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
using namespace std;

bool month_day(int b,int c){
    if(b==1) return c<=31;
    else if(b==2) return c<=28;
    else if(b==3) return c<=31;
    else if(b==4) return c<=30;
    else if(b==5) return c<=31;
    else if(b==6) return c<=30;
    else if(b==7) return c<=31;
    else if(b==8) return c<=31; 
    else if(b==9) return c<=30;    
    else if(b==10) return c<=31;    
    else if(b==11) return c<=30;    
    else if(b==12) return c<=31;   
    return false;
}

bool lunar_month_day(int b,int c){
    if(b==1) return c<=31;
    else if(b==2) return c<=29;
    else if(b==3) return c<=31;
    else if(b==4) return c<=30;
    else if(b==5) return c<=31;
    else if(b==6) return c<=30;
    else if(b==7) return c<=31;
    else if(b==8) return c<=31; 
    else if(b==9) return c<=30;    
    else if(b==10) return c<=31;    
    else if(b==11) return c<=30;    
    else if(b==12) return c<=31;   
    return false;
}

bool check(int a,int b,int c){
    //basic check
    if(a>=1960&&a<=2059){
        if(b>=1&&b<=12){
            if(c>=1&&c<=31){
                //speculate condition
                //leap year
                if(a%100!=0&&a%4==0||a%400==0){
                    if(lunar_month_day(b,c)){
                        return true;//satisfied
                    }
                }
                //normal year
                else{
                    if(month_day(b,c)){
                        return true;
                    }
                }
            }
        }
    }
    return false;
}

int main(){
    string input;
    vector<int>ans{};
    int a=0,b=0,c=0;
    int year1=0,year2=0,day=0,month=0,result1=0,result2=0;
    //constrants:1.leap year 2.year,month,day limitation
    cin>>input;
    a=(input[0]-'0')*10+input[1]-'0';
    b=(input[3]-'0')*10+input[4]-'0';
    c=(input[6]-'0')*10+input[7]-'0';

    //year/month/day
    year1=2000+a;
    year2=1900+a;
    month=b;
    day=c;
    result1=year1*10000+month*100+day;
    bool sss=check(year1,month,day);
    if(check(year1,month,day)) ans.push_back(result1);
    result2=year2*10000+month*100+day;
    if(check(year2,month,day)) ans.push_back(result2);

    //year/day/month
    // year1=2000+a;
    // year2=1900+a;
    // month=c;
    // day=b;
    // result1=year1*10000+month*100+day;
    // if(check(year1,month,day)) ans.push_back(result1);
    // result2=year2*10000+month*100+day;
    // if(check(year2,month,day)) ans.push_back(result2);

    //month/year/day
    // year1=2000+b;
    // year2=1900+b;
    // month=a;
    // day=c;
    // result1=year1*10000+month*100+day;
    // if(check(year1,month,day)) ans.push_back(result1);
    // result2=year2*10000+month*100+day;
    // if(check(year2,month,day)) ans.push_back(result2);

    //month/day/year
    year1=2000+c;
    year2=1900+c;
    month=a;
    day=b;
    result1=year1*10000+month*100+day;
    if(check(year1,month,day)) ans.push_back(result1);
    result2=year2*10000+month*100+day;
    if(check(year2,month,day)) ans.push_back(result2);

    //day/year/month
    // year1=2000+b;
    // year2=1900+b;
    // month=c;
    // day=a;
    // result1=year1*10000+month*100+day;
    // if(check(year1,month,day)) ans.push_back(result1);
    // result2=year2*10000+month*100+day;
    // if(check(year2,month,day)) ans.push_back(result2);

    //day/month/year
    year1=2000+c;
    year2=1900+c;
    month=b;
    day=a;
    result1=year1*10000+month*100+day;
    if(check(year1,month,day)) ans.push_back(result1);
    result2=year2*10000+month*100+day;
    if(check(year2,month,day)) ans.push_back(result2);
    //sort
    sort(ans.begin(),ans.end());
    //delete the same number
    vector<int>fi_ans{};
    fi_ans.push_back(ans[0]);
    for(int j=0,i=0;i<ans.size();i++){
        if(ans[i]!=fi_ans[j]){
            fi_ans.push_back(ans[i]);
            j++;
        } 
    }

    for(int i=0;i<fi_ans.size();i++){
        int a=fi_ans[i]/10000;
        int b=(fi_ans[i]%10000)/100;
        int c=fi_ans[i]%100;
        if(b<10&&c<10){
            cout<<a<<'-'<<'0'<<b<<'-'<<'0'<<c<<endl;
        }
        else if(b<10){
            cout<<a<<'-'<<'0'<<b<<'-'<<c<<endl;
        }
        else if(c<10){
            cout<<a<<'-'<<b<<'-'<<'0'<<c<<endl;
        }
        else{
            cout<<a<<'-'<<b<<'-'<<c<<endl;
        }
    }
    system("pause");
    return 0;
}