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Re: [Help-gsl] random number generator

From: Tom Vajzovic
Subject: Re: [Help-gsl] random number generator
Date: Thu, 11 May 2006 18:14:18 +0100
User-agent: KMail/1.7.2

Hi Amy,

On Thursday 11 May 2006 10:37, u4r07 wrote:
> hi, attached is my program, i'm trying to get a file with lots of random
> numbers in however when i try and change the seed there is a problem
> i keep getting a compiling error message for the gsl function:
> gsl_rng_set(const gsl_rng * r, s);

you should just write:

gsl_rng_set( r, s );

When you see a line like:

int function_name( some_type var_name, other_type * var_name2 );

This is a prototype, which tells the compiler the types of arguments your 
function takes and what type it returns.

When you call the function (run it), you should already have a variable of the 
correct type, and so you just write it's name.

On a separate note, be aware that you line:

for (s=1; s < 500; s++){...}

will repeat whatever's in the braces 499 times.  To do it 500 times, you need:

for (s=0; s < 500; s++){...}

or if you are confused by counting from zero (who wouldn't be?) then you can 

for (s=1; s <= 500; s++){...}

These two changes won't make your program work on their own, but I'd hate to 
do all of your assignment for you ;-)


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