std::map的删除

 void eraseMap()
 {
 int n = sizeof(MmMethod);
 std::map<CString, int>mapDemo;
 for(int i = ; i < ; i++)
 {
 CString strKey;
 strKey.Format(_T("key:%d"), i);
 mapDemo.insert(std::make_pair(strKey, i));
 }

 for(auto it = mapDemo.begin(); it != mapDemo.end(); /*it++*/)
 {
 int n = it->second;
 if(it->second == )
 {
 mapDemo.erase(it++);//或者it = mapDemo.erase(it);
 }
 else
 {
 it++;
 }
 }
 }