#include <iostream>#include <fstream>#include <vector>#include <string>#include <iterator>#include <algorithm>#include <ctime>#include <cstdlib> int main(){    std::ifstream in_file("words.txt");    if ( in_file.fail() )    {        // handle error    }     std::vector<std::string> v_words;    std::copy( std::istream_iterator<std::string>(in_file),               std::istream_iterator<std::string>(), std::back_inserter(v_words) );     srand( unsigned ( time(0) ) );   // seed rand()    std::string word = v_words[ rand() % v_words.size() ];     // now ''word'' is a word randomly selected from your word list     ...     // rest of program     ...     return 0;}