Problem - Kevin Tafuro

The egads_randlong( ) function gets a pseudo-random long value, whereas egads_
randulong( ) gets a pseudo-random unsigned long value from 0 to ULONG_MAX inclusive.
The functions egads_randint( ) and egads_randuint( ) do the same things, but
on integer types instead of longs. To get a random integer in a specified range, use
the function egads_randrange( ). The min and max arguments are both inclusive,
meaning that they are both values that can possibly be returned.
void egads_randreal(prngctx_t * ctx, double *out, int *error);
void egads_randuniform(prngctx_t *ctx, double *out, double min, double max,
int *error);
void egads_gauss(prngctx_t *ctx, double *out, double mu, double sigma,
int *error);
void egads_normalvariate(prngctx_t *ctx, double *out, double mu, double sigma,
int *error);
void egads_lognormalvariate(prngctx_t *ctx, double *out, double mu, double sigma,
int *error);
void egads_paretovariate(prngctx_t *ctx, double *out, double alpha, int *error);
void egads_weibullvariate(prngctx_t *ctx, double *out, double alpha, double beta,
int *error);
void egads_expovariate(prngctx_t *ctx, double *out, double lambda, int *error);
void egads_betavariate(prngctx_t *ctx, double *out, double alpha, double beta,
int *error);
void egads_cunifvariate(prngctx_t *ctx, double *out, double mean, double arc,
int *error);
The egads_randreal( ) function produces a real number between 0 and 1 (inclusive)
that is uniformly distributed across that space. To get a real number in a particular
range, use the function egads_randuniform( ). For those needing random data in a
nonuniform distribution, there are numerous functions in the previous API to produce
random floats in various common distributions. The semantics for these functions
should be obvious to anyone who is already familiar with the particular
distribution.
void egads_randstring(prngctx_t *ctx, char *out, int len, int *error);
The function egads_randstring( ) generates a random string that can contain any
printable character. That is, it produces characters between ASCII 33 and ASCII 126
(inclusive) and thus contains no whitespace characters. The output buffer must be
allocated by the caller, and it must be at least as long as the specified length plus an
additional byte to accommodate the terminating zero that the function will write to
the buffer.
void egads_randfname(prngctx_t *ctx, char *out, int len, int *error);
The function egads_randfname( ) produces a random string suitable for use as a filename.
Generally, you are expected to concatenate the generated string with a base
path. This function expects the destination buffer to be allocated already, and to be
allocated with enough space to hold the string plus a terminating NULL, which this
function will add.
602 | Chapter 11: Random Numbers
This is the Title of the Book, eMatter Edition
Copyright © 2007 O’Reilly & Associates, Inc. All rights reserved.