Struggling with Tic tac toe C++

I'm relatively new to coding and have been tasked with creating a tic tac toe game in C++, I thought I had all the code done but there are various issues such as user input not being allowed, and only allowing to type one players name instead of two, any help/advice you could give me on how to make this work would be really appreciated.

#include <iostream> using namespace std; int menumain; int oneplayer = 'X';

char square1('1'); char square2('2'); char square3('3'); char square4('4'); char square5('5'); char square6('6'); char square7('7'); char square8('8'); char square9('9');

void toggleplayers() { if (oneplayer == 'X') oneplayer = 'O'; else oneplayer = 'X'; }

char win() { if (square1 == 'X' && square2 == 'X' &&square3 == 'X') return 'X'; if (square4 == 'X' && square5 == 'X' &&square6 == 'X') return 'X'; if (square7 == 'X' && square8 == 'X' &&square9 == 'X') return 'X'; if (square1 == 'X' && square5 == 'X' && square9 == 'X') return 'X'; if (square3 == 'X' && square5 == 'X' &&square7 == 'X') return 'X'; if (square3 == 'X' && square6 == 'X' &&square9 == 'X') return 'X'; if (square1 == 'X' && square4 == 'X' &&square7 == 'X') return 'X'; if (square2 == 'X' && square5 == 'X' &&square8 == 'X') return 'X'; if (square1 == 'O' && square2 == 'O' &&square3 == 'O') return 'O'; if (square4 == 'O' && square5 == 'O' &&square6 == 'O') return 'O'; if (square7 == 'X' && square8 == 'X' &&square9 == 'X') return 'X'; if (square1 == 'O' && square5 == 'O' && square9 == 'O') return 'O'; if (square3 == 'O' && square5 == 'O' &&square7 == 'O') return 'O'; if (square3 == 'O' && square6 == 'O' &&square9 == 'O') return 'O'; if (square1 == 'O' && square4 == 'O' &&square7 == 'O') return 'O'; if (square2 == 'O' && square5 == 'O' &&square8 == 'O') return 'O'; return '/'; } int main() { int playerone, playertwo; system("cls"); cout << "tic tac toe" << endl; cout << "-----------" << endl; cout << "Start game (1)" << endl; cout << "Quit game (2)" << endl; cout << "Press 1 or 2 to proceed." << endl; cin >> menumain; if (menumain == 2) { return 0; } else { cout << "Player One, please enter your name: " << endl; cin >> playerone; system("cls"); cout << "Player Two, please enter your name: " << endl; cin >> playertwo; system("cls"); `

int playermove;
cout << "Choose a number between 1-9 to place!" << endl;
cin >> playermove;

if (playermove == 1) square1 = oneplayer; else if (playermove == 2) square2 = oneplayer; else if (playermove == 3) square3 = oneplayer; else if (playermove == 4) square4 = oneplayer; else if (playermove == 5) square5 = oneplayer; else if (playermove == 6) square6 = oneplayer; else if (playermove == 7) square7 = oneplayer; else if (playermove == 8) square8 = oneplayer; else if (playermove == 9) square9 = oneplayer; cout << "Tic tac toe!" << endl; cout << "------------" << endl; cout << " " << square1 << " | " << square2 << " | " << square3 << " " << endl; cout << " " << square4 << " | " << square5 << " | " << square6 << " " << endl; cout << " " << square7 << " | " << square8 << " | " << square9 << " " << endl; `

    cout << " " << endl;
    cout << playerone << endl;
    cout << playertwo << endl;

while(1) {

if (win() == 'X') { cout << playerone << " wins!" << endl; break; } else if (win() == 'O') { cout << playertwo << " wins!" << endl; break; } toggleplayers(); } `

    system("pause");
    return 0;
    }

}