map(stl) in c++

[rajveer]

hi

i have declared a structure having members as string and int.
now how can i make a function for comparision so that i used it in map.
map<key,value,function>

in function field i need user define function which takes one argument as string and other as int.


please help me out.

thanks

[jacek]

Could you post the exact definition of your map? The key comparison function takes two keys as parameters, not values.

[Tavo92]

You can:

1) If your key is a structure you have created you can create the comparison function like this:

bool operator<(const YourType& k0, const YourType& k1)
{
    //do stuff...
    //return true if k0 is LESS than k1, if k0 is equal or more than k1 return false
}

bool operator<(const YourType& k0, const YourType& k1)
{
    //do stuff...
    //return true if k0 is LESS than k1, if k0 is equal or more than k1 return false
}

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2) Pass a compare function when you create the map. Read this it will explained it very well.