Though I have been successful in creating 2-D arrays in GNU MP which is as follows: mpz_t A[N][N]; mpz_array_init(A[0][0], NOC, SIZE); I was not successful in passing this 2-D array to a function. Can anyone please suggest how to achieve this. I have tried some constructs. Say, this construct  ******************************** func(&A); void func( mpz_t  *A) { } ******************************** does not work. Neither does this one ******************************** func(A); void func( mpz_t A[ ][ ]) { } ******************************* work out. -- Souvik Bhattacherjee