Hello all,
it may be a simple question:
1. In the code below (that compiles cleanly) I pass two variables by
value in a function that takes pointers as arguments, and I still get
the desired results. Is this normal?
2. How could I access vector v2 within AlterVector ? The commented
line produces "Undefined symbols: _v2".
Any help on understanding what is going on would be valuable. Thanks.
-- G.
--- file main.c:
#include <stdio.h>
#include <gsl/gsl_vector.h>
#include <gsl/gsl_math.h>
int main (int argc, const char * argv[])
{
int j; int n=5;
gsl_vector *v1 = gsl_vector_alloc(n);
gsl_vector *v2 = gsl_vector_alloc(n);
for (j=0; j<=n-1; j++) {
gsl_vector_set(v1, j, 1+pow(j,3) );
gsl_vector_set(v2, j, 2*pow(j,3) );
}
printf("Original Vector: \n--------\n");
gsl_vector_fprintf(stdout, v1, "%2.2f" );
AlterVector(v1);
printf("Altered Vector: \n--------\n");
gsl_vector_fprintf(stdout, v1, "%2.2f" );
return 0;
}
--- file sec.c:
#include <gsl/gsl_vector.h>
extern gsl_vector *v2;
void AlterVector(gsl_vector *v1)
{
int j;
for (j=0; j<=v1->size-1; j++)
gsl_vector_set(v1, j, 1+j);
/* gsl_vector_set(v2, j, 2*gsl_vector_get(v1,j) ); */
}
_______________________________________________
Help-gsl mailing list
[email protected]
http://lists.gnu.org/mailman/listinfo/help-gsl
