How can i dynamically allocate 2 dimensional array for an specific purpose?

Question

I want to write a program to keep usernames and passwords on a dynamic 2 dimensional array. but I don't know how can I do this?

can you help me? and also my boss force me not to use structures.

Please edit your question to add more information, like language you use, what had you already tried, .... — Garf365, Dec 06 '16 at 14:11
Duplicate: http://stackoverflow.com/questions/15062718/allocate-memory-2d-array-in-function-c — Garf365, Dec 06 '16 at 14:22
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score 1 · Answer 1 · answered Dec 06 '16 at 19:35

To keep usernames and passwords it is a bad idea to use a 2d array unless the number of users is small.

You need to keep them either in a trie or a hash table.

If you do not need to remove users then you can also use bloom filters for some operations (combined with some of previous methods).

1 Answers1