10.2.19

#include <iostream>
#include <string>
#include <fstream>
#include <iomanip>
using namespace std;

struct Student {
    string Imya, Faliliya, Otchestvo;
    int Kurs, Gruppa;
    double Time;
    void initialize(ifstream &in);

    string toString();
};

void Student::initialize(ifstream &in){
        string temp;
        in >> this->Faliliya >> this->Imya >> this->Otchestvo >> temp;
        this->Kurs = stoi(temp);
        in >> temp;
        this->Gruppa = stoi(temp);
        in >> temp;
        this->Time = stod(temp);

}

string Student::toString() {
    string res = this->Faliliya + " "
        + this->Imya + " "
        + this->Otchestvo + " "
        + to_string(this->Kurs) + " "
        + to_string(this->Gruppa) + " "
        + to_string(this->Time);
    return res;
}

bool isKeySame (Student *s, int keyValue){
    return s->Gruppa == keyValue;
}

int main() {
    setlocale(LC_ALL, "Russian");
    long studCount; string temp; int gruppa;
    ifstream in("input.txt");
    ofstream out("output.txt");
    if (!in) return 0; // Файл пуст
    in >> temp;
    studCount = stol(temp);

    cout << "Введите запрашиваемую группу: ";
    cin >> gruppa;

    auto students = new Student[studCount];

    for (auto s = students; s < students + studCount; s++) {
        s->initialize(in);

        if (isKeySame(s, gruppa)) {
            temp = s->toString();
            out << temp << endl;
            cout << temp << endl;
        }
    }
    in.close();
    out.close();

    return 0;
}