Нужно исправить ошибку функция функция не принимает 0 аргументов

#include <iostream>
#include <cmath>
#include <string>
using namespace std;
 
 
//------------
class praktika {
 
public:
    praktika(std::string name, std::string last_name, std::string otestvo_name, double year, double month, double day, double year1, double month1, double day1, double year2, double month2, double day2, double res, double res1) {
        name_ = name;
        last_name_ = last_name;
        otestvo_name_ = otestvo_name;
        year_ = year;
        month_ = month;
        day_ = day;
        year1_ = year1;
        month1_ = month1;
        day1_ = day1;
        year2_ = year2;
        month_ = month;
        day2_ = day2;
        res_ = res;
        res1_ = res1;
    }
    void Set_snils(std::string name, std::string last_name, std::string otestvo_name, double year, double month, double day, double year1, double month1, double day1, double year2, double month2, double day2, double res, double res1);
    std::string Get_name();
    std::string Get_last_name();
    std::string Get_otestvo_name();
    void age(double year, double month, double day, double year1, double month1, double day1, double year2, double month2, double day2, double res, double res1);
 
private:
    std::string name_;
    std::string last_name_;
    std::string otestvo_name_;
    double year_;
    double month_;
    double day_;
    double year1_;
    double month1_;
    double day1_;
    double year2_;
    double month2_;
    double day2_;
    double res_;
    double res1_;
};
 
 
 
std::string praktika::Get_name() {
 
    return name_;
}
 
std::string praktika::Get_last_name() {
 
    return last_name_;
}
 
std::string praktika::Get_otestvo_name() {
 
    return otestvo_name_;
}
 
void praktika::Set_snils(std::string name, std::string last_name, std::string otestvo_name, double year, double month, double day, double year1, double month1, double day1, double year2, double month2, double day2, double res, double res1) {
    
    name_ = name;
    last_name_ = last_name;
    otestvo_name_ = otestvo_name;
    year_ = year;
    month_ = month;
    day_ = day;
    year1_ = year1;
    month1_ = month1;
    day1_ = day1;
    year2_ = year2;
    month_ = month;
    day2_ = day2;
    res_ = res;
    res1_ = res1; 
}
void praktika::age(double year, double month, double day, double year1, double month1, double day1, double year2, double month2, double day2, double res, double res1){
 
    setlocale(LC_ALL, "Russian");
    cout << "Введите сегодняшнюю дату:";
    cin >> day >> month >> year;
    cout << "Введите дату своего дня рождения:";
    cin >> day1 >> month1 >> year1;
 
    if ((month1 < month) || ((month1 = month) && (day1 <= day)))
        res = year - year1;
    else res = year - year1 - 1;
    if ((month1 < month2) || ((month1 = month2) && (day1 <= day2)))
        res1 = year2 - year1;
    else res1 = year2 - year1 - 1;
 
    cout << "Вам " << res << " лет" << endl;
    cout << "на текущую дату Вам " << res1 << " лет" << endl;
}
 
 
int main() {
    setlocale(LC_ALL, "rus");
    std::string name, last_name, otestvo_name;
    double year, month, day, year1, month1, day1, year2, month2, day2, res, res1;
    std::cout << "Имя: ";
    std::cin >> name;
 
    std::cout << "Фамилия: ";
    std::cin >> last_name;
 
    std::cout << "Отчество: ";
    std::cin >> otestvo_name;
 
    praktika triangle(name, last_name, otestvo_name, year, month, day, year1, month1, day1, year2, month2, day2, res, res1);
        std::cout << "--------------\n"
            "ФИО = " << triangle.Get_name() << " " <<
            triangle.Get_last_name() << " " <<
            triangle.Get_otestvo_name() << "\n" <<
            "Фамилия.И.О. = " << triangle.Get_name() << " " <<
            triangle.Get_last_name()[0] << "." <<
            triangle.Get_otestvo_name()[0] << ".\n";
        triangle.age();
    system("pause");
    return(0);
}