Author: YuMaNzI  2014/01/19

#include<iostream>#include<fstream>#include<string>void f(){
    std::string line;while(std::getline(std::cin, line))//input from the file in.txt{
        std::cout << line <<"\n";//output to the file out.txt}}int main(){
    std::ifstream in("in.txt"
 
);
    std::streambuf *cinbuf = std::cin.rdbuf();//save old buf
    std::cin.rdbuf(in.rdbuf());//redirect std::cin to in.txt!

    std::ofstream out("out.txt");
    std::streambuf *coutbuf = std::cout.rdbuf();//save old buf
    std::cout.rdbuf(out.rdbuf());//redirect std::cout to out.txt!

    std::string word
 
;
    std::cin >> word;//input from the file in.txt
    std::cout << word <<"  ";//output to the file out.txt

    f();//call function


    std::cin.rdbuf(cinbuf);//reset to standard input again
    std::cout.rdbuf(coutbuf);//reset to standard output again

    std::cin >> word;//input from the standard input
 

    std::cout << word;//output to the standard input}