Thread: Creating a map with a new object type

Hi all,

I'm using the standard map library and I was wondering if it is possible to create a map with a type value created by me (in this case, class "User" type).

I was looking for something like this:

Code:

#include "User.h"

#include <map>
#include <string>

(...)

map <string, User> users;

Is this possible? If yes, how?

Many thanks,
João

P.S.: I don't know if it is relevant but I'm not using g++, I'm using Visual C++ 2008 Express Edition since I'll need to design a GUI to this project. I'm saying this because I think sometimes there are some differences between "standard C++ code" and Visual C++ code.

By the way, the error that Visual C++ 2008 Expression Edition displays is the following (the file is Person.cpp):

Person.cpp
C:\Program Files\Microsoft Visual Studio 9.0\VC\include\map(168) : error C3699: '&' : cannot use this indirection on type 'User'
compiler replacing '&' with '^' to continue parsing
c:\documents and settings\blacknail\my documents\visual studio 2008\projects\airline\airline\Person.h(13) : see reference to class template instantiation 'std::map<_Kty,_Ty>' being compiled
with
[
_Kty=std::string,
_Ty=User
]

Thanks matsp for the quick reply

My question is: the way to do it is only through the use of templates or there is another way to use new types in the value field of a map?

I googled a bit but I obtained somehow contradictory answers.

Thanks again,
Jo&#227;o

matsp here it goes, thanks again.

It's a very simple class.

User.h

Code:

#pragma once

ref class User
{
public:
	User(void);

	void setUserId(int id);
	void setUserName(System::String^ name);
	void setUserAddress(System::String^ address);
	void setUserContacts(System::String^ contacts);
	void setAcomulatedMiles(int miles);
	void setUserFunction(System::String^ function);
	void setUserType(System::String^ type);

	int getUserId();
	System::String^ getUserName();
	System::String^ getUserAddress();
	System::String^ getUserContacts();
	int getAcomulatedMiles();
	System::String^ getUserFunction();
	System::String^ getUserType();

protected: 
	int userId;
	System::String^ userName;
	System::String^ userAddress;
	System::String^ userContacts;
	int acomulatedMiles;
	System::String^ userFunction;
	System::String^ userType;
};

User.cpp

Code:

#include "StdAfx.h"
#include "User.h"

User::User(void)
{
	this->userId = 0;
	this->userName = "";
	this->userAddress = "";
	this->userContacts = "";
	this->acomulatedMiles = 0;
	this->userFunction = "";
	this->userType = "";
}

void User::setUserId(int id) {
	this->userId = id;
}

void User::setUserName(System::String^ name) {
	this->userName = name;
}

void User::setUserAddress(System::String^ address) {
	this->userAddress = address;
}

void User::setUserContacts(System::String^ contacts) {
	this->userContacts = contacts;
}

void User::setAcomulatedMiles(int miles) {
	this->acomulatedMiles = miles;
}

void User::setUserFunction(System::String^ function) {
	this->userFunction = function;
}

void User::setUserType(System::String^ type) {
	this->userType = type;
}

int User::getUserId() {
	return this->userId;
}

System::String^ User::getUserName() {
	return this->userName;
}

System::String^ User::getUserAddress() {
	return this->userAddress;
}

System::String^ User::getUserContacts() {
	return this->userContacts;
}

int User::getAcomulatedMiles() {
	return this->acomulatedMiles;
}

System::String^ User::getUserFunction() {
	return this->userFunction;
}

System::String^ User::getUserType() {
	return this->userType;
}

I solved my problem, thanks! It had to do with the Managed code I had... I deleted that code and now I'm using only non-Managed code.

Now I&#180;ve changed the code to:

Code:

(..)
map <string, User*> users;
(..)

...and (at least) it compiles!

Thanks for all again,
Jo&#227;o