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holyshine

[½»Á÷] ÇóÖú£¬P-R·½³ÌCÓïÑÔ±à³ÌÇó½âÎÊÌâ

#include
#include

void main()
{
int k,sign;
double f(double V);
double v3,v4,q3;
double x[50],A,B,C;


x[1]=1.0;*É趨³õÖµ
x[2]=2.0;
x[3]=3.0;  
k=3;

while(fabs(x[k]-x[k-1])>0.00001)*Muller·¨µü´ú
{
  v3=(x[k]-x[k-1])/(x[k-1]-x[k-2]);
  q3=1+v3;
  A=f(x[k-2])*v3*v3-f(x[k-1])*v3*q3+f(x[k])*v3;
  B=f(x[k-2])*v3*v3-f(x[k-1])*q3*q3+f(x[k])*(v3+q3);
  C=f(x[k])*q3;
  
  if (B>0)
          sign=1;
  else
          sign=-1;
  v4=-2*C/(B+sign*sqrt(B*B-4*A*C));
  x[k+1]=x[k]+v4*(x[k]-x[k-1]);

   k++;
}
  printf("Mullerµü´ú·½·¨ËùÇóʵ¸ùX=%lf\n",x[k]);
  printf("µü´ú´ÎÊý:%d\n",k);
}

double f(double V)
{ double R=8.314,Tc=190.69,Pc=4604000,w=0.013; *ÁÙ½çζÈѹÁ¦Æ«ÐÄÒò×Ó
   double Q,T,a,b,P,e,d,K,Tr;
printf("ÇëÊäÈëѹÁ¦P(ǧÅÁ)ºÍζÈT(¿ª¶ûÎÄ)\n";
scanf("%lf,%lf",&P,&T);

Tr=T/Tc;
K=0.37464+1.54226*w-0.26992*w*w;
e=0.45724*R*R*Tc*Tc/Pc;
d=pow((1+K*(1-sqrt(Tr))),2.0);
a=e*d;
b=0.0778*R*Tc/Pc;
printf("a=%lf",a);

    Q=R*T/(V-b)-a/(V*(V+b)+b*(V-b))-P; *ÀûÓÃP-R·½³Ì¹¹ÔìµÄµü´ú¸ñʽ
   return Q;
}
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