63 lines
1.0 KiB
C++
63 lines
1.0 KiB
C++
// Copyright (C) 2005, Ondra Kamenik
|
|
|
|
// $Id: pascal_triangle.h 762 2006-05-22 13:00:07Z kamenik $
|
|
|
|
#ifndef PASCAL_TRIANGLE_H
|
|
#define PASCAL_TRIANGLE_H
|
|
|
|
#include <vector>
|
|
|
|
namespace ogu
|
|
{
|
|
|
|
using std::vector;
|
|
|
|
class PascalRow : public vector<int>
|
|
{
|
|
int k;
|
|
public:
|
|
PascalRow()
|
|
: vector<int>(), k(1)
|
|
{
|
|
push_back(2);
|
|
}
|
|
void setFromPrevious(const PascalRow &prev);
|
|
void prolong(const PascalRow &prev);
|
|
void prolongFirst(int n);
|
|
void print() const;
|
|
};
|
|
|
|
class PascalTriangle
|
|
{
|
|
vector<PascalRow> tr;
|
|
public:
|
|
PascalTriangle()
|
|
{
|
|
tr.push_back(PascalRow());
|
|
}
|
|
PascalTriangle(const PascalTriangle &triang)
|
|
: tr(triang.tr)
|
|
{
|
|
}
|
|
const PascalTriangle &
|
|
operator=(const PascalTriangle &triang)
|
|
{
|
|
tr = triang.tr; return *this;
|
|
}
|
|
int noverk(int n, int k);
|
|
void print() const;
|
|
protected:
|
|
void ensure(int n, int k);
|
|
int max_n() const;
|
|
int max_k() const;
|
|
};
|
|
};
|
|
|
|
extern ogu::PascalTriangle ptriang;
|
|
|
|
#endif
|
|
|
|
// Local Variables:
|
|
// mode:C++
|
|
// End:
|