Hi People

I'm a newbie in c, I learn in c++, but I don`t really know to much. A friend make a code in c, working in a linux pc. And works perfect.

I normally work in Micorsoft Visual Studio, but this c code, seems not to work well (88 errors). So I start using DevCpp and looks that the c code runs, but there still are too much errors (31). Why the different compilers show different number of errors. The code employ a lot of gsl libraries (GNU Scientific Library).

You have any idea what ould be happening.

Thanx in advance for your time

Paulville


This are the kind of error that appears

In function `web_calc':
92: parse error before `double'
96: `y' undeclared (first use in this function)
96: (Each undeclared identifier is reported only once
96: for each function it appears in.)
100: parse error before `)'
103: `params' undeclared (first use in this function)
115: parse error before `const'
126: `t' undeclared (first use in this function)
135: `tend' undeclared (first use in this function)
146: parse error before `int'
147: `status' undeclared (first use in this function)
187: `s' undeclared (first use in this function)
188: `c' undeclared (first use in this function)
189: `e' undeclared (first use in this function)
In function `dynamics':
227: parse error before `ydot_vec'
245: `EAgsl' undeclared (first use in this function)
245: `yjgsl' undeclared (first use in this function)
245: `tvec' undeclared (first use in this function)
247: `Hmat' undeclared (first use in this function)
251: `Gmat' undeclared (first use in this function)
262: `Tmat' undeclared (first use in this function)
268: parse error before `*'
273: `Bp' undeclared (first use in this function)
277: `ratio' undeclared (first use in this function)
282: `death' undeclared (first use in this function)
291: `ydotgsl' undeclared (first use in this function)
295: parse error before `double'
311: `growth' undeclared (first use in this function)
312: `index1' undeclared (first use in this function)
313: `index2' undeclared (first use in this function)
315: `oldtemp' undeclared (first use in this function)

Pasting the first 100 lines (so we see everything upto the first error line number, and a bit beyond) would be helpful.

Ok Salem I'll do it. I will edit it, but like the line with errors appear in here, I don't change it.

#include <stdio.h>
#include <math.h>
#include <gsl/gsl_matrix.h>
#include <gsl/gsl_vector.h>
#include <gsl/gsl_rng.h> // random number generator
#include <gsl/gsl_odeiv.h> // ODE-solving procedures
#include <gsl/gsl_errno.h> // errorhandler
#include <gsl/gsl_blas.h> // linear algebra with vecors and matrices

// global variables:
double alpha=0.1; // mortality rate
double beta=1; // interspecific concurrence
double lambda=0.5; // biologic efficiency
double K1=1; // carrying capacity of resources
double aleph=1; // half saturation density (scaling parameter for volumes)
double beth=1; // handling time
double delta1=20; // growth rate of resources
double z=0.5; // ration of sizes between two size classes
double Imax=10; // maximum ingestion rate
double T=1; // metabolic requirements (maintenace costs)
int GC=0;

double *web_calc(int S, int B, const gsl_rng_type *T, gsl_rng *r, FILE *populdata, FILE *inputdata);
int dynamics(double t, const double y[], double ydot[], void *params);
int Delta(int i, int j);
int Theta(double g);

//*******************************************************************
// Main Part
//*******************************************************************
int main(void)
{
FILE *populdata; // Hier werden die Populationen reingeschrieben
FILE *inputdata; // File with input parameters/ abundances
int B=1; // Anzahl der unabhaengigen externen Ressourcen
int S=4; // Anzahl der Spezies im Netz (ohne Ressourcen)

const gsl_rng_type *T; // ****
gsl_rng *r; // Initialisierung des Zufallszahlengenerators
gsl_rng_env_setup(); // ****
T=gsl_rng_default; // default random number generator (so called mt19937)
gsl_rng_default_seed=4395; // Startwert fuer den RNG
r=gsl_rng_alloc(T);

populdata=fopen("ssp-N.out","w");
inputdata=fopen("data.input","r");

web_calc(S,B,T,r,populdata,inputdata);

fclose(populdata);
fclose(inputdata);

gsl_rng_free(r);

return(0);
}

//****************************************************************************
// Produce network structure and calculate the population sizes
//****************************************************************************
double *web_calc(int S, int B, const gsl_rng_type *T, gsl_rng *r, FILE *populdata, FILE *inputdata)
{
int i,j,k;
int L=2,flag,xflag; // Kontrollvariablen

double *test=(double *)calloc(2*B+2*(S+L),sizeof(double));

gsl_matrix *Ap=gsl_matrix_calloc (B+S,B+S);
gsl_matrix *A=gsl_matrix_calloc (B+S,B+S);

// determine feeding relationships
gsl_matrix_set(Ap,1,0,1);
gsl_matrix_set(Ap,2,0,1);
gsl_matrix_set(Ap,2,1,1);
gsl_matrix_set(Ap,3,0,1);
gsl_matrix_set(Ap,3,2,1);
gsl_matrix_set(Ap,4,0,1);
gsl_matrix_set(Ap,4,3,1);

gsl_matrix_set(A,1,0,1);

gsl_matrix_set(A,2,0,0.7);

gsl_matrix_set(A,2,1,0.3);

gsl_matrix_set(A,3,0,0.7);

gsl_matrix_set(A,3,2,0.3);
gsl_matrix_set(A,4,0,0.7);
gsl_matrix_set(A,4,3,0.3);

double *y = (double *) calloc(B+S,sizeof(double)); // populations
double *params=(double *) calloc(2+(B+S)*(B+S),sizeof(double));

for(i=0;i<=B-1;i++)
y[i]=1;

for(i=B;i<=B+S-1;i++)
// y[i]=gsl_rng_uniform_pos(r)*1/(double)S;
y[i]=1/(double)S);
// fscanf(inputdata,"%lf \n",&y[i]);


The code simulates a trophic network based on the size of the individuals. At the beggining we ceate some matrix that indicate who eats who, and there preference for each other.

Basically your compiler is complainig that is missing a lot of variables. Are you sure you are including every Header file necesary for the code to compile. A header file might have what web_calc and dynamics functions are.

Yes, I have included all the headers!!

math.h
stdio.h
and all the gsl libraries

And like I tell you the same folder runs well in linux!! And the compiler never complains about a missing header. It always does

I see that you post some code portion while I was replaying.
Try to locate every variable or function that the compile doesn't see. And find out why it doesn't see it.

Ok!

I´m going to do that. But someone knows why it could be running well in Linux and but in Windows, that is something normal, do you recommends me to make a partition in my hard disk, linux:windows? Or what!??

These header files are not part of the Standard C Library:
#include <gsl/gsl_matrix.h>
#include <gsl/gsl_vector.h>
#include <gsl/gsl_rng.h> // random number generator
#include <gsl/gsl_odeiv.h> // ODE-solving procedures
#include <gsl/gsl_errno.h> // errorhandler
#include <gsl/gsl_blas.h> // linear algebra with vecors and matrices

Those are part of the GNU Scientific Library. No in your Windows compiler by default.

I know. I lalready copy the GSL library in the default folder of my Windows compiler

I was trying to point to some possible cause why it worked in Linux but not in Windows.
Just because you have installed a port of those libraries to Windows is not garantie that the implementation of the code is the same. If there were Standard C Libraries then you'll know that the implementation of the code would have a greater chance of running in both
platforms without any major change.