Re: Maps

From:

"Alex Blekhman" <xfkt@oohay.moc>

Newsgroups:

microsoft.public.vc.stl

Date:

Tue, 22 Aug 2006 11:57:54 +0300

Message-ID:

<OkNAQkcxGHA.5044@TK2MSFTNGP05.phx.gbl>

"Alamelu" wrote:

This is my scenario...

I have unsigned char constants defined in my class...

const unsigned char strKey1[] = "Key1";
const unsigned char strValue1[] = "Value1";

const unsigned char strKey2[] = "Key2";
const unsigned char strValue2[] = "Value2";

I want these data to be populated in a map..
If Key1 .. i should retrieve Value1...
If Key2 .. i should retrieve Value2...

How do i code this...???????

You can put pointers to char into map. However, you will
need to ensure that memory occupied by strings will remain
valid for lifetime of the map. Much simpler is to use
std::string class:

--------------------------------------------------------
typedef std::map<std::string, const std::string> STRMAP;

int main()
{
    STRMAP m1;
    m1.insert(STRMAP::value_type("key1", "one"));
    m1.insert(STRMAP::value_type("key2", "two"));
    m1.insert(STRMAP::value_type("key3", "three"));

    const STRMAP m2(m1);

    // retrieve value
    STRMAP::const_iterator it = m2.find("key1");

    if(it != m2.end())
        std::cout << (*it).second;
    else
        std::cout << "not found";

    return 0;
}
--------------------------------------------------------

HTH
Alex