Random generator

#include <iostream>
#include <fstream>
#include <string>
#include <ctime>
#include <stdlib.h>

using namespace std;

string s1;
string s2;
string s3;
string s5;

void write();
void read();
int random();

int main() {

    read();

    string s4;

    cout << "Write to the file (Y/N): ";
    cin >> s4;

    if(s4 == "Y" || s4 == "y" || s4 == "Yes" || s4 == "yes") {
        write();
    } else if(s4 == "N" || s4 == "n" || s4 == "No" || s4 == "no") {
        random();
    } else {
        cout << "Wrong input!" << endl;
    }
}

void write() {
    ofstream file ("file.txt");

    cin >> s1 >> s2;

    s3 = s1 + " " + s2;

    file << s3;
}

void read() {
    ifstream file ("file.txt");

    if(file.is_open()) {
        while(file.good()) {
            getline(file, s5);
            cout << s5 << endl;
        }
        file.close();
    }
}


int random() {
    srand(time(NULL));
    ifstream file("file.txt");
    int r1;

    if(file.is_open()) {
        while(file >> s1 >> s2) {

        }
        file.close();
    }


    for(int i = 0; i<3; i++) {
        r1 = rand() % 2 + 1;

        if(r1 == 1) {
            cout << s1 << endl;
        } else if(r1 == 2) {
            cout << s2 << endl;
        }
    }

}