C++ 算法 中的 none_of函数

template <class InputIterator, class UnaryPredicate>
bool none_of (InputIterator first, InputIterator last, UnaryPredicate pred);

#include <iostream>
#include <algorithm>
#include <array>
int main()
{
	std::array<int, 6> arr= {25,27,29,31,33,35};
	if ( std::none_of(arr.begin(), arr.end(), [](int k) {return k%2==0;} ) )
	std::cout <<"None of the elements is divisible by 2";
	return 0;
}

#include<iostream>
#include<algorithm>
using namespace std;
bool abc(int b)
{
	return b<0;
}
int main()
{
	int ar[] = { 2,4,6,8,12,0 };
	int p = sizeof(ar)/sizeof(ar[0]);
	cout<<"Array";
	for(int k=0; k<p; k++)
	cout<<" "<<ar[k];
	if(none_of(ar, ar+p, abc))
	cout<<"None of the elements in the range are negative";
	else
	cout<<"The range has at least one element that is negative";
	return 0;
}