c 2b 2b stream string into fiel

1string filetostring(){
2	ifstream file("file", ios::binary);
3    string fileStr;
4
5    istreambuf_iterator<char> inputIt(file), emptyInputIt;
6    back_insert_iterator<string> stringInsert(fileStr);
7
8    copy(inputIt, emptyInputIt, stringInsert);
9
10    return fileStr;
11}

1#include <fstream>
2#include <string>
3#include <iostream>
4
5int main()
6{
7    std::string input;
8    std::cin >> input;
9    std::ofstream out("output.txt");
10    out << input;
11    out.close();
12    return 0;
13}