c++ - How to find unique element count in string array? -


this question exact duplicate of:

for example, have list of towns. 20 of them in fact, in 20 town string array there 4 unique towns, randomly scattered in array , can repeat. how find unique town count?

use std::set, e.g.

std::set<std::string> myset(list_of_towns.begin(), list_of_towns.end());

assuming town names in std::vector called list_of_towns.


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