23 lines
362 B
C++
23 lines
362 B
C++
#include "nr.h"
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void NR::zbrak(DP fx(const DP), const DP x1, const DP x2, const int n,
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Vec_O_DP &xb1, Vec_O_DP &xb2, int &nroot)
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{
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int i;
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DP x,fp,fc,dx;
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int nb=xb1.size();
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nroot=0;
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dx=(x2-x1)/n;
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fp=fx(x=x1);
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for (i=0;i<n;i++) {
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fc=fx(x += dx);
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if (fc*fp <= 0.0) {
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xb1[nroot]=x-dx;
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xb2[nroot++]=x;
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if(nroot == nb) return;
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}
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fp=fc;
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}
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}
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