how to create and write into a file using C++

#include<bits/stdc++.h>

using namespace std;

int main()

{

    string s;

    cin>>s;

    ofstream out;

    out.open("student.txt",ios::out|ios::app);

    out<<"Hello I am ujjal\n";

    out<<s<<endl;

    out.close();

    return 0;

}