47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
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#define NRANSI
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#include "nrutil.h"
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#define EPS 1.0e-6
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extern int nn2,nvar;
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extern float x1,x2,xf;
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int kmax,kount;
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float *xp,**yp,dxsav;
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void shootf(int n, float v[], float f[])
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{
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void derivs(float x, float y[], float dydx[]);
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void load1(float x1, float v1[], float y[]);
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void load2(float x2, float v2[], float y[]);
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void odeint(float ystart[], int nvar, float x1, float x2,
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float eps, float h1, float hmin, int *nok, int *nbad,
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void (*derivs)(float, float [], float []),
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void (*rkqs)(float [], float [], int, float *, float, float,
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float [], float *, float *, void (*)(float, float [], float [])));
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void rkqs(float y[], float dydx[], int n, float *x,
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float htry, float eps, float yscal[], float *hdid, float *hnext,
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void (*derivs)(float, float [], float []));
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void score(float xf, float y[], float f[]);
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int i,nbad,nok;
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float h1,hmin=0.0,*f1,*f2,*y;
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f1=vector(1,nvar);
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f2=vector(1,nvar);
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y=vector(1,nvar);
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kmax=0;
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h1=(x2-x1)/100.0;
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load1(x1,v,y);
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odeint(y,nvar,x1,xf,EPS,h1,hmin,&nok,&nbad,derivs,rkqs);
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score(xf,y,f1);
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load2(x2,&v[nn2],y);
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odeint(y,nvar,x2,xf,EPS,h1,hmin,&nok,&nbad,derivs,rkqs);
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score(xf,y,f2);
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for (i=1;i<=n;i++) f[i]=f1[i]-f2[i];
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free_vector(y,1,nvar);
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free_vector(f2,1,nvar);
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free_vector(f1,1,nvar);
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}
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#undef EPS
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#undef NRANSI
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