你这注释的格式就有问题呀！
#include "udf.h"
#include "sg_pb.h"
#include "sg_mphase.h"
DEFINE_PB_NUCLEATION_RATE(nuc_rate, cell, thread)
{
real B;/* nucleation rate in #/(s kg-solvent) */
real Kb_1 = 4.355; /* primary nucleation rate constant */
real Kb_2 = 3.968e14; /*secondary nucleation rate constant */
real b_1 = 1.852; /* primary nucleation law power index */
real b_2 = 4.226;/* secondary nucleation law power index */
real x;/*the antisolvent proportion in kg- antisolvent/kg-antisolvent and solvent */
real y;/*the solubility in kg-solute/kg- antisolvent and solvent */
real C;/*the solute concentration in kg-solute/kg-solvent*/
real Solubility;/*the solubility in kg-solute/kg-solvent */
real delta_C;/*the difference between the solute concentration and the solubility, kg-solute/kg-solvent*/
real solute_mass_frac,solvent_mass_frac,antisolvent_mass_frac;
real m;
Thread *tc = THREAD_SUPER_THREAD(thread); /*obtain mixture thread */
Thread *pt = THREAD_SUB_THREADS(thread); /*pointer to sub_threads */
Thread tp = pt[P_PHASE]; /* primary phase thread */
solute_mass_frac = C_YI(cell,tp,0);/*mass fraction of solute in primary phase (solvent,antisolvent,Paracetamol)*/
solvent_mass_frac = C_YI(cell,tp,1);/* mass fraction of solvent in primary phase (solvent,antisolvent,Paracetamol ) */
antisolvent_mass_frac = 1.-solute_mass_frac-solvent_mass_frac;/* mass fraction of antisolvent in primary phase (solvent,antisolvent,Paracetamol)*/
x = antisolvent_mass_frac/(antisolvent_mass_frac+solvent_mass_frac);/*the antisolvent proportion in kg- antisolvent/kg-antisolvent and solvent */
y = -2.63748*pow(x,4)+9.04654*pow(x,3)-10.86277*pow(x,2)+5.04399*x-0.57920; /* the solubility in kg-solute/kg- antisolvent and solvent */
Solubility = y*(1+(antisolvent_mass_frac/solvent_mass_frac)); /*the solubility in kg-solute/kg- solvent */
C = solute_mass_frac/solvent_mass_frac;/*the solute concentration in kg-solute/kg- solvent*/
delta_C = C-Solubility; /* Definition of Supersaturation */
m = C_VOF(cell, pt[1])*1293.;
if (delta_C == 0.)
{
B = 0.;
}
else
{
B = (Kb_1)*pow(delta_C,b_1)+(Kb_2)*pow(delta_C,b_2)*m;
}
return B;
}
代码的部分问题我帮你修改了，不一定都正确，你自己再检查检查，然后再按上面这图中提示的信息自己查阅资料（无论UDF手册还是C语言基础书籍还是其他什么资料）去进行调试吧，加油！