43 lines
914 B
C++
43 lines
914 B
C++
#include <iostream>
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#include "FloatArray.hh"
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#include "DFA.cc"
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#include "LFA.cc"
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void polyshow (FloatArray& f) {
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for (int i=f.minIndex(); i<=f.maxIndex(); i=i+1)
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if (f.isMember(i) && f[i]!=0.0)
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std::cout << "+" << f[i] << "*x^" << i;
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std::cout << std::endl;
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}
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void polymul (FloatArray& a, FloatArray& b, FloatArray& c) {
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// Loesche a
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for (int i=a.minIndex(); i<=a.maxIndex(); i=i+1)
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if (a.isMember(i))
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a[i] = 0.0;
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// a = b*c
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for (int i=b.minIndex(); i<=b.maxIndex(); i=i+1)
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if (b.isMember(i))
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for (int j=c.minIndex(); j<=c.maxIndex(); j=j+1)
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if (c.isMember(j))
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a[i+j] = a[i+j]+b[i]*c[j];
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}
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int main ()
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{
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// funktioniert mit einer der folgenden Zeilen:
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// DynamicFloatArray f,g;
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ListFloatArray f,g;
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f[0] = 1.0; f[100] = 1.0;
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polymul(g,f,f);
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polymul(f,g,g);
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polymul(g,f,f);
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polymul(f,g,g); // f=(1+x^100)^16
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polyshow(f);
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}
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