如何使用GMP库初始化多维数组

Question

This is java code which is using BigInterger lib. I want to rewrite in C, I referred GMP Documentation but not able to find and logic can anyone help me?

BigInteger X[][] = new BigInteger[4][4];

Answer 1

Here is the basic approach to multi-dim arrays in gmp:

mpz_t **A;
size_t n;

A=malloc(n*sizeof(mpz_t*));
a[0]=malloc(n*n*sizeof(mpz_t));
for(int i=1;i<n;i++)
   A[i]=A[i-1]+(n*sizeof(mpz_t));

Even better, embed it in a struct to carry round size info

struct GMPMatrix
{
   unsigned int m_size;
   mpz_t  **m_data;
};

and write an initialization routine for the matrix.

If you are simply looking for a robust matrix library have a look at:

https://cs.uwaterloo.ca/~astorjoh/iml.html

Uses gmp and atlas