Good hash function for struct key that has three ints

Question

For a simple C ++ structure that has three ints to identify a unique structure, which can be a good implementation of a hash function if you don't know too much about the realistic values ​​of a, b, and c. Do I need to use struct as Key for unordered_map?

struct Key {

        int a, b, c;

    }

Answer 1

Pass the whole structure to Murmurhash: https://sites.google.com/site/murmurhash/

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