Выход из цикла while знаком '|' ?

int main() {
    int number1 = 0;
    int number2 = 0;
 
    while (number1 != '|') {
        cout << "First number: ";
        cin >> number1;
        cout << "Second number: ";
        cin >> number2;
        
        if (number1 > number2)
            cout << "Second number less than first.\n";
        else if (number2 > number1)
            cout << "First number less than second.\n";
        else
            cout << "\nNumbers are equeals.\n";
 
        cout << "\nFirst: " << number1;
        cout << "\nSecond: " << number2;
        cout << '\n';
    }

    int number1 = 0;
    int number2 = 0;
 
    while (true) {
        cout << "First number: ";
        if (!(cin >> number1))
            break;
        cout << "Second number: ";
        if (!(cin >> number2))
            break;
        
        if (number1 > number2)
            cout << "Second number less than first.\n";
        else if (number2 > number1)
            cout << "First number less than second.\n";
        else
            cout << "\nNumbers are equeals.\n";
 
        cout << "\nFirst: " << number1;
        cout << "\nSecond: " << number2;
        cout << '\n';
    }

        cout << number1;
        if (number1 > number2)
            cout << " > ";
        else if (number2 > number1)
            cout << " < ";
        else
            cout << " = ";
       cout << number2<<endl;

cin.clear();
cin.ignore(numeric_limits<streamsize>::max(), '\n');

While(cin >> number1)