Code:
#include <iostream>
#include <fstream>
#include <string>

using namespace std;

int main()
{
    char str[100];
    string s;
    
    ofstream a_file ("LW_Text.txt", ios::app);
    cout<<"Please input some text.\n";
    cout<<">";
    getline(cin,s);
    cin.ignore();
    a_file<<getline(cin,s);
    a_file.close();
    cin.get();
}