how do i use maps?

looked around, didn't see any tutorials or whatnot, so now i'm asking you guys......

how do you use the map variable? do i HAVE to have the namespace thing? I need to know EXACTLY what I need for them, will they work with visual studio? what library file do i need? which header files? etc....

thanks in advance.

you will find tutorials on the web but the best place to learn STL is from a book and the best book is The c++ standard library by nicolai jossutis.

Here's a quick example:

Code:

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#include <iostream>
#include <map>
#include <string>

#include <cmath> // For atan( )

using namespace std;

int main( void ) {

        map< string, double > theMap;

        theMap[ "pi" ] = 4 * atan( 1 );

        cout<<"pi="<<theMap[ "pi" ]<<endl;

        return 0;

}

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