fluent udf编写问题

请问我这样编写后，为什么fluent软件里，角速度不会发生变向？是udf不支持if...else if...else...语句吗？#include "udf.h"DEFINE_CG_MOTION(left,dt,cg_vel,cg_omega,time,dtime){ NV_S(cg_omega,=,0.0); if(time<=0.5) cg_omega[2]=-0.5; else if(time>0.5&time<=1) cg_omega[2]=0.5; else if(time>1&time<=1.5) cg_omega[2]=-0.5; else if(time>1.5&time<=2) c...