Tanosing_Final

#include <iostream>
#include <ctime>
#include <Windows.h>
#include <string>
#include <clocale>
using namespace std;
int iq_c = 0;
int mid_iq = 0;
const string names[] = { "Верос Нерети", "Трерас Дрес", "Тирер Белвайн", "Арон Андарен", "Эд Теман", "Энар Релет", "Фелен Марион", "Лларар Берелот", "Рерон Ринит", "Мавон Дреним" };

class student{
public:
    string FIO = names[rand() % 10];
    int iq = 0;
    student(){ iq = rand() % 100; }
    student(int i){ iq = i; }
    student(string s, int i){ FIO = s; iq = i; }
    student(string s){ FIO = s; iq = rand() % 100; }
    void show(){
        cout << "\n" << FIO << " : " << iq;
    }
};

struct element{
    student* data;
    element* next;
};

class group{
private:
    element *list, *cur, *temp;
    int current = 0;

public:
    void add(int n){
        for (int i = 0; i < n; i++) add();
    }
    void add(){
        temp = new element();
        temp->data = new student();
        temp->next = list->next;
        list->next = temp;
    }
    void show(){
        temp = list->next;
        while (temp){
            temp->data->show();
            temp = temp->next;
        }
    }
    void show(int n)
    {
        if (n > count()||n<=0)
        {
            cout << "\n\n >>> !!! tu ma4 h04esh !!! ERROR!!! <<< \n";
        }
        else
        {
            current = n;
            temp = list->next;
            int i = 1;
            while (i != n)
            {
                i++;
                temp = temp->next;
            }
            temp->data->show();
        }
    }
    int count()
    {
        int i = 0;
        temp = list->next;
        while (temp){
            i++;
            temp = temp->next;
        }
        return i;
    }
    void del(){
        if (list->next){
            temp = list->next;
            list->next = list->next->next;
            delete temp;
        }
    }
    void del(int n){
        for (int i = 0; i < n; i++) del();
    }
    void middle_iq(){
        float s = 0;
        float k = 0;
        temp = list->next;
        while (temp){
            s += temp->data->iq;
            k++;
            temp = temp->next->next;
        }
        show();
        cout << endl;
        cout << "Middle iq : " << s / k << endl;
    }
    void more_iq(int n){
        int c = 0;
        temp = list->next;
        while (temp){
            if (temp->data->iq > n) c++;
            temp = temp->next->next;
        }
        show();
        cout << endl;
        cout << "Количество студентов с iq выше заданного : " << c;
    }
    void next()
    {
        current++;
        show(current);
    }
    void prev()
    {
        current--;
        show(current);
    }
    void del_cert(int n)
    {
        if (n > count() || n <= 0)
        {
            cout << "\n\n >>> !!! tu ma4 h04esh !!! ERROR!!! <<< \n";
        }
        else
        {
            temp = list->next;
            int i = 1;
            while (i != n)
            {
                i++;
                temp = temp->next;
            }
        }
        del();
    }
    void add_n_element(int n){
        if (n <= 0 || n > count() + 1) {
            cout << "\n !!! tu ma4 h04esh !!! EPPOP !!! <<< \n";
        }
        else if (n == 1) {
            add();
        }
        else {
            current = n;
            int i = 1;
            cur = list->next;
            while (i < n - 1) {
                i++;
                cur = cur->next;
            }
            temp = new element();
            string FIO = names[rand() % 10];
            temp->data = new student(FIO);
            temp->next = cur->next;
            cur->next = temp;
        }
        show();
    }
    group(){
        list = new element();
        list->data = NULL;
        list->next = NULL;
    }
    group(int n){
        list = NULL;
        add(n);
    }
    void tanosing(){
        while (list) del();
    }
    ~group(){
        while (list) del();
    }
};


int main(){
    setlocale(LC_CTYPE, "Russian");
    group* G21 = new group();
    int choose;
    int n;
    do{

        cout << "1-add  2-add(n)  3-del  4-del(n)  5-show  6-shel4ok  7-student number  8-mid_iq  9-more_iq(n)  10-del(x)  0-exit\n";
        cout << "11 show(n) 12-prev 13-next 14-del_cert 15-add_n_element \n";
        cout << "? >> ";
        cin >> choose;
        system("CLS");
        switch (choose){
        case 1: G21->add(); G21->show(); break;
        case 2:  cin >> n; G21->add(n); G21->show(); break;
        case 3: G21->del(); G21->show(); break;
        case 4:  cin >> n; G21->del(n); G21->show(); break;
        case 5: G21->show(); break;
        case 6: G21->tanosing(); break;
        case 7: cout << "Количество студентов: "; cout << G21->count(); break;
        case 8: G21->middle_iq(); break;
        case 9: cin >> n; G21->more_iq(n); break;
        case 11: cin >> n; G21->show(n); break;
        case 12: G21->prev(); break;
        case 13: G21->next(); break;
        case 14: cin >> n; G21->del_cert(n); G21->show(); break;
        case 15: cin >> n; G21->add_n_element(n); break;
        }

        cout << "\n================================\n";
    } while (choose != 0);
    cout << "\n\n\n\n";
    system("pause");
}