Question

I want to check if a certain key is found in a map, if so i want to put it in a variable for other uses, but the thing is I dont want to use iterators. I found the find function in the map class, but it returns an iterator, I want to like check if a key is found in map, if it returns true to obtain it

Thanks

Answer 1

std::map::count() will inform you if the map contains a particular key. If the key is in the map, then you could use operator[] to get at the value, knowing that a default value will not be added (though as ildjarn points out would require two searches of the map):

std::map<int, int> m;

m[0] = 1;
m[1] = 2;

if (m.count(0))
{
    std::cout << "value=" << m[0] << "\n";
}

Why find() is unattractive, is not clear to me:

std::map<int, int>::iterator i = m.find(0);
if (i != m.end())
{
    std::cout << "value=" << i->second << "\n";
}