The algorithm for evaluating the confluent hypergeometric function was
published as:

    M. Nardin, W. F. Perger, and A. Bhalla, Algorithm 707. CONHYP: A
    numerical evaluator of the confluent hypergeometric function for
    complex arguments of large magnitudes, ACM Trans. Math. Software
    18 (1992), 345--349.

I downloaded the associated FORTRAN code from here:

    http://netlib.org/toms/707.gz

Changes that I made to the code:

1. I commented out the sample program at the end of the code.
2. I deleted trailing whitespace.
3. I removed label 292 for which there was no matching "goto".
4. In line 911 I changed CMPLX to DCMPLX to get rid of the error
   "Result of CMPLX overflows its kind".

Use of ACM Algorithms is subject to the ACM Software Copyright and
License Agreement which is reprinted below.

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