[Oula]

Hi everyone

I'm getting the following warning when I compil a UDF function in fluent.

warning C4700: uninitialized local variable 'tmin' used

Does anyone have any idea why?. Please see below the function. Any help is much appreciated

#include "udf.h"

#define ID 8
DEFINE_EXECUTE_AT_END(wall_temp)
{
#if !RP_HOST
face_t f;
real temp, tmax, tmin;
real value;
Domain *domain = Get_Domain(ROOT_DOMAIN_ID);
Thread *t = Lookup_Thread(domain,ID);
begin_f_loop(f,thread)
{
temp = F_T(f,t);
value = (temp - tmin) / (tmax-tmin);
F_UDMI(f,t,0) = value;
F_UDMI(F_C0(f, t), t->t0, 0) = value;
}
end_f_loop(f,thread);
#endif
}

[obscureed]

Hi Oula,

That error message can be restated: you use the value of "tmin" in a calculation, but you have not put a value into "tmin". This is true in your code, and it is a serious problem -- the compiler calls it a warning (rather than an error), but it means that all your calculations could be garbage. You need to give "tmin" a value (for example "tmin = 100.0;") before you use it.

Also, in "begin_f_loop(f,thread)" and "end_f_loop(f,thread);", there is no variable called "thread" -- you should use "t" instead. Also, strictly speaking, that semicolon is unnecessary.

Good luck!
Ed