?1 // ?created?by?ztwaker?on?2006-8-10
?2 // ?Used?for:?email
?3
?4 #include? < iostream >
?5 #include? < string >
?6 #include? < algorithm >
?7 using ? namespace ?std;
?8
?9 inline? bool ?isbegch( const ? int ?c)
10 {
11 ???? return ?(?c? == ? ' _ ' ? || ?(c? >= ? ' A ' ? && ?c? <= ? ' Z ' )? || ?
12 ????????????(c? >= ? ' a ' ?? && ?c? <= ? ' z ' )?);
13 }
14
15 inline? bool ?isfolch( const ? int ?c)
16 {
17 ???? return ?(?c? == ? ' _ ' ? || ?c? == ? ' . ' ? || ?(c? >= ? ' A ' ? && ?c? <= ? ' Z ' )? || ?
18 ????????????(c? >= ? ' a ' ?? && ?c? <= ? ' z ' )? || ?(c? >= ? ' 0 ' ? && ?c? <= ? ' 9 ' )?);
19 }
20
21 bool ?isValidName( const ? string & ?name)
22 {
23 ????typedef? string ::const_iterator??SIT;
24 ????????
25 ????SIT?it? = ?name.begin();????
26 ???? if ?( ! isbegch(static_cast < int > ( * it)))? return ? false ;
27 ???? for ?(;it? != ?name.end();? ++ it)
28 ???? {
29 ???????? if ?( ! isfolch(static_cast < int > ( * it)))? return ? false ;
30 ????}
31 ????
32 ???? return ? true ;
33 }
34
35 bool ?isValidDomain( const ? string & ?domain)
36 {
37 ????typedef? string ::const_iterator??SIT;
38 ???? for ?(SIT?it? = ?domain.begin();?it? != ?domain.end();? ++ it)
39 ???? {
40 ???????? if ?( ! isfolch(static_cast < int > ( * it)))? return ? false ;
41 ????}
42 ????
43 ???? return ? true ;
44 }
45
46
47 void ?getMail( const ? string & ?eml,? string & ?name,? string & ?domain)
48 {
49 ???? if ?( string ::npos? != ?eml.find( " @ " ))
50 ???? {
51 ????????name??? = ?isValidName(eml.substr( 0 ,?eml.find( " @ " )))? ? ?
52 ????????????eml.substr( 0 ,?eml.find( " @ " ))?:? "" ;
53 ????????
54 ????????domain? = ?isValidDomain(eml.substr(eml.find( " @ " ) + 1 ,?eml.size() - eml.find( " @ " )))? ?
55 ????????????eml.substr(eml.find( " @ " ) + 1 ,?eml.size() - eml.find( " @ " ))?:? "" ;
56 ????}
57 }
58
59
60 void ?test()
61 {
62 ???? const ? string ?eml? = ? " waker615@163.com " ;
63 ???? string ?name,?domain;
64 ????getMail(eml,?name,?domain);
65 ????cout? << ?name.c_str()? << ? " @ " ? << ?domain.c_str()? << ?endl;????
66 }
67
68 int ?main()
69 {
70 ????test();
71 ???? return ? 0 ;
72 }