51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
/*
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* Copyright © 2005 Ondra Kamenik
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* Copyright © 2019 Dynare Team
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*
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* This file is part of Dynare.
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*
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* Dynare is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Dynare is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Dynare. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef PASCAL_TRIANGLE_H
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#define PASCAL_TRIANGLE_H
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#include <vector>
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class PascalRow : public std::vector<int>
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{
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int k{1};
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public:
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PascalRow() : std::vector<int>{}
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{
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push_back(2);
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}
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void setFromPrevious(const PascalRow &prev);
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void prolong(const PascalRow &prev);
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void prolongFirst(int n);
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void print() const;
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};
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namespace PascalTriangle
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{
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void ensure(int n, int k);
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/* ⎛n⎞
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Computes binomial coefficient ⎝k⎠, hence the function name (“n over k”).
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*/
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int noverk(int n, int k);
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void print();
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};
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#endif
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