why almost all encryption algorithms written by c language?

Question

is there special reason to write encryption algorithms by c code

Answer 1

no, an algorithm can be implemented in whatever language you like (they even exist in javascript). usually for such algorithm you only need simple data structures and arithmetics, so you don't need a high soffisticated language, and the resulting C programs will be generally faster then implementaions in higher level programming languages.

Answer 2

Because C stands for "_C_reate algorithms".

Answer 3

Since they're not, there's no real answer to your question.