vector list 2

#include <iostream>
#include <cmath>
#include <vector>
#include <algorithm>
#include <string>
#include <fstream>
#include <sstream>
#include <set>
#include <map>
#include "list.h"

using namespace std;
ifstream in("input.txt");
ofstream out("output.txt");

class Forum {
public:
    string nick, town;
    int age;
    Forum() {}
    Forum(string nick, string town, int age) {
        setNick(nick);
        setTown(town);
        setAge(age);
    }
    void setNick(string nick) {
        this->nick = nick;
    }
    void setTown(string town) {
        this->town = town;
    }
    void setAge(int age) {
        this->age = age;
    }
    void printout() {
        cout << nick << " " << town << " " << age << endl;
    }
};

int main() {
    vector <Forum> vec(4);
    list <Forum> lst;
    vec[0] = Forum("myloyo", "saratov", 18);
    vec[1] = Forum("skrpopova", "saratov", 15);
    vec[2] = Forum("karych", "saratov", 15);
    vec[3] = Forum("soap", "moscow", 100);

    //буква а
    Forum h;
    cin >> h.nick >> h.town >> h.age;
    bool p = 1;
    for (auto x : vec) {
        if (x.nick == h.nick) {
            p = 0;
        }
    }
    if (p) {
        vec.push_back(h);
    }

    for (auto x : vec) {
        x.printout();
    }

    int n;
    cin >> n;
    string nn, tt;
    cin >> nn >> tt;
    vec[n].setNick(nn);
    vec[n].setTown(tt);

    for (auto x : vec) {
        x.printout();
    }
    cout << endl << endl;

    // буква б
    for (auto x : vec) {
        lst.insert(lst.getlength(), x);
    }

    for (int i = 0; i < lst.getlength(); i++) {
        lst[i].printout();
    }
    cout << endl;
    Forum z;
    cin >> z.nick >> z.town >> z.age;
    lst.insert(0, z);
    cout << endl;

    for (int i = 0; i < lst.getlength(); i++) {
        lst[i].printout();
    }

    string k;
    cin >> k;
    int r = 0;
    for (int i = 0; i < lst.getlength(); i++) {
        if (lst[i].nick.length() == k.length()) {
            for (int j = 0; j < k.length(); j++) {
                if (k[j] != lst[i].nick[j]) {
                    r++;
                }
            }
            if (r <= 1) {
                lst.insert(lst.getlength(), lst[i]);
                lst.remove(i);
            }
        }
    }

    for (int i = 0; i < lst.getlength(); i++) {
        lst[i].printout();
    }
}

soup saratov 17
2
kkkkr spb
idk msk 900
soap