Regarding power function

[hari]

Hello!
    Iam implementing a program using gmp lib. But i
wasnt able to do a^b because gmp doesnt have that
function where as it has a^b mod c. 
      It would be great if any one of you would let me
know is there any power function to calculate power of
an mpz_t type of variable.

thanking you
Hari

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