MLGetRealArray()

#include "mathlink.h"

/* read an array of double-precision floating-point numbers from a link */

void f(MLINK lp)
{
    double *data;
    long *dims;
    char **heads;
    long d; /* stores the rank of the array */

    if(! MLGetRealArray(lp, &data, &dims, &heads, &d))
        {
            /* unable to read the array from lp */
            return;
        }

    /* ... */

    MLDisownRealArray(lp, data, dims, heads, d);    
}