Chapter 12: Random Number Generation > random_seed_set

random_seed_set

Initializes a random seed for use in the random number generators.

Synopsis

#include <imsls.h>

void imsls_random_seed_set (int seed)

Required Arguments

int seed   (Input)
The seed of the random number generator. The argument seed must be in the range (0, 2147483646). If seed is 0, a value is computed using the system clock; hence, the results of programs using the random number generators will be different at various times.

Description

Function imsls_random_seed_set is used to initialize the seed used in the random number generators. The form of the generators is as follows:

xi cxi1mod (231 1)

The value of x0 is the seed. If the seed is not initialized prior to invocation of any of the functions for random number generation by calling imsls_random_seed_set, the seed is initialized by the system clock. The seed can be reinitialized to a clock-dependent value by calling imsls_random_seed_set with seed set to 0.

The effect of imsls_random_seed_set is to set some global values used by the random number generators. A common use of imsls_random_seed_set is in conjunction with function imsls_random_seed_get to restart a simulation.

Example

See function imsls_random_seed_get.


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