c++11之函数式编程实例

#ifndef LEAPYEAR_INCLUDED
#define LEAPYEAR_INCLUDED

class LeapYear
{
public:
bool IsLeapYear(int year);
};
#endif

#include "leapyear.hpp"

auto Or = [](bool a,bool b)->bool{ return a||b; };

auto And = [](bool a,bool b)->bool{ return a&&b; };

auto Not = [](bool a)->bool{ return !a; };

auto Aliquot = [](int dividend,int divisor){return dividend%divisor == 0;};

bool LeapYear::IsLeapYear(int year)
{
auto aliquotby4 = Aliquot(year,4);
auto notaliquotby100 = Not(Aliquot(year,100));
auto aliquotby400 = Aliquot(year,400);
auto leapyear = Or(And(aliquotby4,notaliquotby100),aliquotby400);
return leapyear;
}