#include <iostream>
#include <cstdlib>
#include <ctime>
#include <fstream>

using namespace std;

int main() {
    srand(time(NULL));
    int m, n;
    int x, v = 1;
    int max;

    while (v) {
        cout << "MENU\n1 - write data to file\n2 - read file and calculate\n";
        cin >> x;
        switch (x) {
        case 1: {
            cout << "input number\n";
            cin >> n;
            ofstream fi("file.txt");

            for (int i = 0; i < n; i++) {
                m = rand() % 51 - 25;
                cout << m << '\t';
                fi << m << '\t';
            }

            fi.close();

            cout << endl;
            break;
        }
        case 2: {
            int s = 0, p;
            ifstream fo("file.txt");
            while (!fo.eof()) {
                fo >> p;
                if (!fo.eof()) {
                    if (p % 2 != 0) {
                        max = p;
                        if (max < p) {
                            max = p;
                        }

                    }
                }
            }

            fo.close();
            cout << "Maksimalnij element sered neparnih " << max << endl;
            break;
        }
        default: v = 0;
            break;
        }
    }

    system("pause");
    return 0;
}