#include <fstream>
#include <iostream>
#include <stdio.h>
using namespace std;
int main()
{
ofstream outfile;
outfile.open("data.txt");
cout << "Input data: ";
cin >> input_data;
outfile << input_data;
outfile.close();
}
#include <fstream>
#include <iostream>
#include <stdio.h>
using namespace std;
int main()
{
ofstream outfile;
outfile.open("data.txt");
cout << "Input data: ";
cin >> input_data;
outfile << input_data;
outfile.close();
}