Rene Girard wrote:
gcc -O2 -Wall -ansi -I/usr/local/include -c -o t_dn2.o t_dn2.c
t_dn2.c: In function ‘g_x’:
t_dn2.c:61: warning: dereferencing ‘void *’ pointer
t_dn2.c:61: error: void value not ignored as it ought to be
>
double g_x(double x, void *params)
{
const double pi = 4.0*atan(1.0);
double yo,y1;
yo = (sin(pi*x/2.0)*sin(pi*params[1]/2));
y1 = yo*yo;
With the prototype for g_x() above params[1] is an invalid expression,
because params has void* type. Use something like double *p = params;
then access elements as p[0], p[1] etc.
--
best regards,
Brian Gough
Network Theory Ltd,
Publishing "An Introduction to GCC"
http://www.network-theory.co.uk/gcc/
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