how to store pointers in map

Question

I am working on one of the project which requires

class MyObj;  map<string, MyObj*> myMap; 

Here logic is here to map file name to MyObj class.

If I try to insert following

string strFilename = "MyFile"; MyObj* pObj  = new MyObj();  myMap.insert(strFileName, pObj); // This line throwing following error. 

no matching function for call to 'std::map<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void*, std::less<std::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<const std::basic_string<char, std::char_traits<char>, std::allocator<char> >, void*> > >::insert(std::string&, void*)'

Can any one please help me how to solve this. Are is there better way we can do this using STL

Answer 1

I've typedef'd this stuff to make it more readable...

typedef std::map<std::string, MyObj*> MyMap; typedef std::pair<std::string, MyObj*> MyPair;  MyMap myMap; string strFilename = "MyFile"; MyObj* pObj = new MyObj(); myMap.insert(MyPair(strFilename, pObj)); 

Answer 2

std::map requires a pair when you use the insert function.

You have two options, either:

myMap[strFileName] = pObj; 

Or:

myMap.insert(std::make_pair(strFileName,pObj));