maths.h

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#ifndef MATHS_H
#define MATHS_H
#include "error.h"
 
namespace original {


constexpr long double E = 2.7182818284590452353602874713526624977572470937000L;

constexpr long double PI = 3.1415926535897932384626433832795028841971693993751L;

template<typename TYPE>
TYPE abs(TYPE a);

template<typename TYPE>
TYPE max(TYPE a, TYPE b);

template<typename TYPE>
TYPE min(TYPE a, TYPE b);

double pow(double base, int exp);
 
} // namespace original
 
// ----------------- Definitions of maths.h -----------------
 
template<typename TYPE>
auto original::abs(TYPE a) -> TYPE
{
    return a > TYPE{} ? a : -a;
}
 
template<typename TYPE>
auto original::max(TYPE a, TYPE b) -> TYPE
{
    return a > b ? a : b;
}
 
template<typename TYPE>
auto original::min(TYPE a, TYPE b) -> TYPE
{
    return a < b ? a : b;
}
 
inline auto original::pow(const double base, const int exp) -> double
{
    if (base == 0 && exp <= 0)
    {
        throw valueError();
    }
    double res = 1.0;
    for (int i = 0; i < abs(exp); i += 1)
    {
        res *= base;
    }
    return exp >= 0 ? res : 1 / res;
}
 
#endif //MATHS_H