Printing a text file (C++)

#include <iostream>#include <fstream>#include <iterator>#include <algorithm>using namespace std;int main ( void ) {    ifstream file( "filename.txt" );    istream_iterator< char > begin( file ) , end;    ostream_iterator< char > output( cout );    copy( begin , end , output );}

#include <iostream>#include <fstream>#include <string>#include <vector>using namespace std;int main ( void ) {    ifstream file( "filename.txt" ); //opens a file...    vector< string > lines; //we'll store lines in here...    while ( file ) { //while the file is good...        string line;        getline( file , line ); //get a line from file and put it into line        if ( ! line.empty() ) lines.push_back( line ); //if the line isn't empty, add it to lines.    }    cout << lines[ rand() % lines.size() ] << endl; //print a random line.}