1 #include <iostream>  2 #include <string>  3 #include <vector>  4 #include <fstream>  5 #include <stdio.h>  6 #include <stdlib.h>  7 #include <string.h>  8 #include <sstream>  9 #include <stdexcept> 10 #define ERR_EXIT(m)  11     do {  12         perror(m); 13         exit(EXIT_FAILURE); 14     }while(0) 15 using namespace std; 16  17 void readfile( ifstream &in, vector<string> &vec); 18 void toloweranderasepunct(string &str); 19 vector<string> querystr( vector<string> &vec ); 20  21 int main(int argc, const char *argv[]) 22 { 23     if(argc < 2) 24     { 25         perror("Usage: exe, filename"); 26         exit(EXIT_FAILURE); 27     } 28         29     vector<string> vec ; 30     vector<string> dup ; 31     ifstream in(argv[1]); 32     if( !in ) 33         throw runtime_error("open file failure"); 34      35     readfile( in, vec ); 36      37  38     dup =  querystr( vec ); 39     cout << "from duplicate vector:" << endl ; 40      41     for(vector<string>::iterator it = vec.begin();  42         it != vec.end();  43         ++it) 44     { 45         cout << *it << endl;     46     } 47      48     in.close(); 49     return 0; 50 } 51  52 void readfile( ifstream &in, vector<string> &vec) 53 { 54     vec.clear(); 55     string s ; 56     while(in >> s) 57     { 58         toloweranderasepunct( s ); 59         vec.push_back(s); 60     } 61 } 62  63 void toloweranderasepunct( string &str) 64 { 65     string::iterator it = str.begin(); 66     while( it != str.end()) 67     { 68         if(ispunct(*it)) 69         { 70             it = str.erase(it); 71         }else if(isupper(*it)) 72         { 73             *it = tolower(*it); 74             it++ ; 75         }else 76             it++ ; 77     } 78 } 79  80  81 //veersion:search a line 82 vector<string> querystr( vector<string> &vec) 83 { 84     string line ; 85     vector<string> dup; 86     while( getline( cin, line ) ) 87     { 88         istringstream stream(line); 89         string str ; 90         while( stream >> str) 91         { 92             for(vector<string>::iterator it = vec.begin(); 93                     it != vec.end(); 94                     ++it) 95             { 96                 string::size_type pos = it->find(str); 97                 if( pos!= string::npos )//success 98                 { 99                     cout << *it << endl ;100                     dup.push_back(*it);101                 }102             }103         }104     }105     return dup ;106 }107 108 /*109 //version1:search ch or string;110 void querystr( vector<string> &vec )//为什么不能用const111 {112     string str ;113     while( cin >> str)114     {115         for(vector<string>::iterator it = vec.begin();116             it != vec.end();117             ++it)118         {119             string::size_type pos = it->find(str);120             if( pos!= string::npos )//success121                 cout << *it << endl ;122         }123     }124 }125 126 */