Regarding STL

Hello.

I am new to STL. I have written a c++ program which compiles correctly but crash when i run it. Please tell me what is wrong here. Thanks in advance.

Code:

#include <set>
#include <map>

class DataType {
public:
      std::set<string> dataSubtypeSet;
};
typedef std::map<string, DataType* >    DataTypeMap;

class TemplateData {
public:
      DataTypeMap dataTypeMap;
};

int main(){

     TemplateData *templateData = new TemplateData();
      int sizeB = templateData->dataTypeMap.size();
      string dataTypeValue;
      DataType *dataType = new DataType();
      templateData->dataTypeMap.insert(std::make_pair(dataTypeValue, dataType));
      int sizeA = templateData->dataTypeMap.size();
}

Regards,
Sunny.

Compiles correctly? Not for me:

1>------ Build started: Project: CProg2, Configuration: Debug Win32 ------
1>Compiling...
1>CProg2.cpp
1>c:\...\cprog2\cprog2.cpp(6) : error C2065: 'string' : undeclared identifier
1>c:\...\cprog2\cprog2.cpp(17) : error C2512: 'TemplateData' : no appropriate default constructor available
1>c:\...\cprog2\cprog2.cpp(18) : error C2662: 'std::_Tree<_Traits>::size' : cannot convert 'this' pointer from 'DataTypeMap' to 'const std::_Tree<_Traits> &'
1> Reason: cannot convert from 'DataTypeMap' to 'const std::_Tree<_Traits>'
1> Conversion requires a second user-defined-conversion operator or constructor
1>c:\...\cprog2\cprog2.cpp(19) : error C2146: syntax error : missing ';' before identifier 'dataTypeValue'
1>c:\...\cprog2\cprog2.cpp(19) : error C2065: 'dataTypeValue' : undeclared identifier
1>c:\...\cprog2\cprog2.cpp(20) : error C2512: 'DataType' : no appropriate default constructor available
1>c:\...\cprog2\cprog2.cpp(21) : error C2663: 'std::_Tree<_Traits>::insert' : 2 overloads have no legal conversion for 'this' pointer
1>c:\...\cprog2\cprog2.cpp(22) : error C2662: 'std::_Tree<_Traits>::size' : cannot convert 'this' pointer from 'DataTypeMap' to 'const std::_Tree<_Traits> &'
1> Reason: cannot convert from 'DataTypeMap' to 'const std::_Tree<_Traits>'
1> Conversion requires a second user-defined-conversion operator or constructor
1>Build log was saved at "file://c:\...\CProg2\Debug\BuildLog.htm"
1>CProg2 - 8 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Putting #include <string> and std:: in front of all your instances of "string" will fix those. After that it compiles/links and runs although you should fix the memory leaks (you forgot to delete those two pointers you allocate).