f77 [ flags ] file(s) ... -L/usr/local/lib -lgjlC (K&R, 89, 99), C++ (98):REAL FUNCTION ran()
cc [ flags ] -I/usr/local/include file(s) ... -L/usr/local/lib -lgjl
Use#include <gampsi.h>to get this prototype:fortran_real ran(void);
NB: The definition of C/C++ data types fortran_ xxx, and the mapping of Fortran external names to C/C++ external names, is handled by the C/C++ header file. That way, the same function or subroutine name can be used in C, C++, and Fortran code, independent of compiler conventions for mangling of external names in these programming languages.
Last code modification: 14-Jul-2000
The initial generator seed is the same on the first call to this function after every program startup, so that the sequence of pseudo-random number is reproducible. This routine has no provision for the user to alter the initial seed.
The algorithm is based on ``ACM Algorithm 266: Pseudo-Random Numbers'', by M. C. Pike and I. D. Hill, Communications of the ACM, Vol. 8, No. 10, 605--606, October 1965, modified by Hansson, and later used in the book ``Software Manual for the Elementary Functions'', by W. J. Cody, Jr. and W. Waite, Prentice-Hall (1980), ISBN 0-13-822064-6.
Algorithm xxx: Quadruple-Precision Gamma(x) and psi(x) Functions for Real Argumentsin ACM Transactions on Mathematical Software, Volume ??, Number ??, Pages ????--???? and ????--????, 2001, by
andNelson H. F. Beebe Center for Scientific Computing University of Utah Department of Mathematics, 110 LCB 155 S 1400 E RM 233 Salt Lake City, UT 84112-0090 Tel: +1 801 581 5254 FAX: +1 801 581 4148 Email: beebe@math.utah.edu, beebe@acm.org, beebe@computer.org WWW URL: http://www.math.utah.edu/~beebe
James S. Ball University of Utah Department of Physics Salt Lake City, UT 84112-0830 USA Tel: +1 801 581 8397 FAX: +1 801 581 6256 Email: ball@physics.utah.edu WWW URL: http://www.physics.utah.edu/people/faculty/ball.html