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/****************************************************************************/
/* ___Demonstrates invalid ID handling in inteface with pointer checking___ */
/* This prorgam prints a few random numbers, frees the stream, and then */
/* tries to use the stream again. */
/****************************************************************************/
#include <stdio.h>
#ifndef CHECK_POINTERS
#define CHECK_POINTERS /* do not uncomment this line */
#endif
#include "sprng.h" /* SPRNG header file */
#define SEED 985456376
main()
{
int streamnum, nstreams, *stream;
double rn;
int i;
int gtype; /*--- */
/*--- reading in a generator type */
#include "gen_types_menu.h"
printf("Type in a generator type (integers: 0,1,2,3,4,5): ");
scanf("%d", >ype);
/**************************** Initialize *********************************/
streamnum = 0;
nstreams = 1;
stream = init_sprng(gtype,streamnum,nstreams,SEED,SPRNG_DEFAULT); /*initialize stream */
printf("Print information about random number stream:\n");
print_sprng(stream);
/*********************** print random numbers *****************************/
printf("Printing 3 random numbers in [0,1):\n");
for (i=0;i<3;i++)
{
rn = sprng(stream); /* generate a double precision random number */
printf("%f\n", rn);
}
/**************************** free memory *********************************/
free_sprng(stream); /* free memory used to store stream state */
/********************** Try using freed stream ****************************/
fprintf(stderr,"Expect a SPRNG error message on the use of an invalid stream ID\n");
rn = sprng(stream);
printf("sprng returns %f on being given an invalid stream ID\n", rn);
}
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