array是C++11标准最新引入的一个容器类型，简单来说，它就是一个更加好用的、STL Container Style的数组。具体怎么好用，可以参考下面的示例代码：

#include <iostream>
#include <array>
#include <stdexcept>
#include <cstring>
#include <cstdlib>

using namespace std;

int main(int argc, char **argv)
{
	cout << "array" << endl;
	array<int,5> ary;
	ary.fill(0);
	for(auto x : ary) {
		cout << x << endl;
	}
	for(unsigned int i=0;i<ary.size();i++){
		ary[i]=i;
	}
	
	try {
		cout << ary.at(ary.size()) << endl;
	}catch (out_of_range &e) {
		cout << "out of range: " << e.what() << endl;
	}
	
	for(auto x : ary) {
		cout << x << endl;
	}
	
	cout << "front: " << ary.front() << endl;
	cout << "back:  " << ary.back() << endl;
	cout << "size:  " << ary.size() << endl;
	cout << "max size: " << ary.max_size() << endl;
	cout << "empty? " << ary.empty() << endl;
	
	int *mi=(int *)malloc(ary.size()*sizeof(int));
	for(unsigned int i=0;i<ary.size();i++){
		mi[i]=i*i;
	}
	memcpy(ary.data(),mi,ary.size()*sizeof(int));
	for(auto x : ary) {
		cout << x << endl;
	}
	free(mi);
	return 0;
}

参考资料：

http://www.cplusplus.com/reference/array/array/