[dsaen]

I'm trying to add the math.h library to my simple UDF:

#include "udf.h"
#include "math.h"

DEFINE_PROFILE(squarewave, thread, pos) {
	
	face_t f;
	real A;
	real tm1= 1;
	real tm2 = 1;
	real t = CURRENT_TIME;
	
	begin_f_loop(f, thread) {
		A = fmod(t, tm1+ tm2);
                A = round(A*10000)/10000;
		
		if (A == 0) {
			F_PROFILE(f, thread, pos) = 100;
		}
		if (A == tm1) {
			F_PROFILE(f, thread, pos) = 0;
		}
	}
	end_f_loop(f, thread)
}

However, I'm getting the errors:

math.h: No such file or directory
line 13: fmod: undeclared variable

I'm assuming I'm adding the math.h library wrongly. How should I correctly add this library?

Thanks

[AlexanderZ]

compile your code, not interpret

best regards

[Abhinand]

If, I am not mistaken, the udf.h library has the files to import all the standard libraries a normal c function takes, like I/O or math functions.
So it is best to not add any of the standard files and just stick with udf.h.

It will work correctly on both interpretation and compilation

-Abhinand

[pakk]

Regardless of your issue: compile, don't interpret. Ansys should remove the option to interpret, it is in almost every aspect inferior to compiling.