#include <iostream>#include <string>#include <vector>#include <iterator>#include <fstream>using namespace std;string srcFileName = "visited.all";int main(int argc, char* argv[]){	if( argc!=2 ) {		cout << "error argument!" << endl;		exit(-1);	}		srcFileName = argv[1];	ifstream ifsVisitedUrl(srcFileName.c_str(),ios::binary);        if(!ifsVisitedUrl){                cerr << "did not find " << srcFileName << " for iutput" << endl;        }                       string strUrl,strHost;	vector<string> vecHost;	string::size_type idx;	vector<string>::iterator itResult;        while( getline(ifsVisitedUrl,strUrl) ){		idx = strUrl.find('/',7);		if( idx != string::npos ){			strHost = strUrl.substr( 7, idx-7);		}		idx = strHost.rfind(':');		if( idx != string::npos ){			strHost = strHost.substr(0, idx);		}		itResult = find(vecHost.begin(), vecHost.end(), strHost );		if ( itResult == vecHost.end() ){			vecHost.push_back( strHost );		}		//cout << "host: " << strHost << endl;		//break;		        }                ifsVisitedUrl.close();	cout << endl << "total: " << vecHost.size() << " hosts." << endl;	vector<string >::iterator it = vecHost.begin();	for ( ; it != vecHost.end(); ++it ){		cout << (*it) << endl;	}	return 0;}