CFD Online Discussion Forums - "unresolved external symbol"

I've fixed the problem. Thanks!

I write a proram for the purpose of user-defined initialization. But Fluent gives the error message when compiling it. Can anybody figure out the reason? Thanks!

Quote:

# Generating udf_names.c because of makefile my_init_func.obj
udf_names.c
# Linking libudf.dll because of makefile user_nt.udf udf_names.obj my_init_func.obj
Microsoft (R) Incremental Linker Version 6.00.8168
Copyright (C) Microsoft Corp 1992-1998. All rights reserved.
Creating library libudf.lib and object libudf.exp
my_init_func.obj : error LNK2001: unresolved external symbol _ran
libudf.dll : fatal error LNK1120: 1 unresolved externals

Code:

#include<stdio.h>

#include<stdlib.h>

#include<time.h>

#include<udf.h>

#include<math.h>

#define K 4 //K nucleis per cell

#define mu 2.6 //expected value

#define sigma 8.0 // standard deviation

#define PI 3.1416926

#define maxi 10000000

float gauss(void)

{

 float tmp; //tmp value

 float u;

 float v;

 //float mu; // the expected value of Gauss Distrubution

 tmp=0;

 srand((unsigned)time(NULL));

 

 while(mu-2>tmp||tmp>mu+2){

  u=ran()*1.0/RAND_MAX;

  v=ran()*1.0/RAND_MAX;

  tmp=sqrt(-2*log(u))*cos(2*PI*v)*sigma+mu;

 }

 return tmp;

}

DEFINE_INIT(my_init_function, domain)

{

 cell_t c;

 Thread *t;

 int i; //loop control

 int j; //loop control

 //int cnum = domain->cell_count; // the total number of cells

 float *radius[maxi][K];

 j=0;

 thread_loop_c(t,domain)

 {

  for(i=0;i<K;i++)

   *radius[j][i]=gauss();

  j++;

 }

}