updating maps

[nigelhoath]

Hi all

Having probs updating the key of a multimap record. I've tried various examples from here and there but no luck using mingw 3.4.2 Everything apart from update of key works (insert, erase, find ...) So below a simplified example, with between commented asterisks just one of my attempts of where the problem is.

As always any guidance greatly appreciated

/*
Testing maps
*/
#include <iostream>
#include <sstream>
#include <fstream>
#include <stdio.h>
#include <string.h>
#include <list>
#include <string>
#include <time.h>
#include <map>
#include <vector>
#include <conio.h>

using namespace std;

int main(int argc, char *argv[])
{
	typedef map <string, string> MAP_STRING_MESSAGE;
	typedef multimap <string, string> MMAP_STRING_MESSAGE;
	
	MAP_STRING_MESSAGE::iterator ilocator1;
   	MAP_STRING_MESSAGE::iterator findlocator1;
   	
	MAP_STRING_MESSAGE amap;
	
	amap.insert(make_pair("first","One"));
	amap.insert(make_pair("second","Two"));
	amap.insert(make_pair("third","Three"));
	
	for ( ilocator1 = amap.begin(); ilocator1 != amap.end(); \
   		++ ilocator1 )
   	{
		cout << ilocator1->first << "\n";
		cout << ilocator1->second << "\n";
		cout << "____________________________\n";									
	}
		   	
	findlocator1 = amap.find("second");
	// ************************
                findlocator1->first = "fourth";
	// ************************
	for ( ilocator1 = amap.begin(); ilocator1 != amap.end(); \
   		++ ilocator1 )
   	{
		cout << ilocator1->first << "\n";
		cout << ilocator1->second << "\n";
		cout << "____________________________\n";									
	}

getch();	
}