http://www.jackxiang.com/index.php zh-cn http://www.jackxiang.com/post// jack <xdy108@126.com> Sun, 31 Dec 2017 10:32:00 +0000 http://www.jackxiang.com/post// #include <iostream> #include <string> #include <iterator> #include <map> using namespace std;                                                                                                                 int main(){    typedef map<string,string,less<string> > map_type;    map_type m;    map_type::iterator iter;    m.insert(map_type::value_type("Join","A senior heigh school student."));    m.insert(map_type::value_type("Marry","A senior heigh school teacher."));    m.insert(map_type::value_type("Bill","A senior heigh school student."));    for(iter = m.begin();iter != m.end(); iter++)         cout <<  (*iter).first << ", " << (*iter).second << endl;    return 0; }

make stl_map
g++     stl_map.cpp   -o stl_map

./stl_map
Bill, A senior heigh school student.
Join, A senior heigh school student.
Marry, A senior heigh school teacher.


/data/codesdev/testdemo/c++/map/stl_map_find.cpp
//map::find #include <iostream> #include <map> int main () {     std::map<char,int> mymap;     std::map<char,int>::iterator it;     mymap['a']=50;     mymap['b']=100;     mymap['c']=150;     mymap['d']=200;     it = mymap.find('b');     if (it != mymap.end())         mymap.erase (it);     // print content:     std::cout << "elements in mymap:" << '\n';     std::cout << "a => " << mymap.find('a')->second << '\n';     std::cout << "c => " << mymap.find('c')->second << '\n';     std::cout << "d => " << mymap.find('d')->second << '\n';     std::cout << "b => " << mymap.find('b')->second << '\n';     std::cout << "e => " << mymap.find('e')->second << '\n';     return 0; }
make stl_map_find
g++     stl_map_find.cpp   -o stl_map_find
./stl_map_find
elements in mymap:
a => 50
c => 150
d => 200
b => 0
e => 0


修改那个位置判断为：
[codes=php]
     it = mymap.find('d');
     if (it != mymap.end())    #if (iter == g_map_fd_TcpNLMsg.end())假如到最扣一个依然没有找到的意思。一般就直接返回。
         mymap.erase (it);
[/php]
这样的结果：
./stl_map_find        
elements in mymap:
a => 50
c => 150
d => 0
b => 100
e => 0


来自：http://blog.csdn.net/derkampf/article/details/71155055 ]]> http://www.jackxiang.com/post//#blogcomment <user@domain.com> Thu, 01 Jan 1970 00:00:00 +0000 http://www.jackxiang.com/post//#blogcomment