Array header problem in c++ , why we don't use it directly. Following message appears while using it...

Question

[Error] #error This file requires compiler and library support for the ISO C++ 2011 standard. This support is currently experimental, and must be enabled with the -std=c++11 or -std=gnu++11 compiler options.
[Error] 'array' was not declared in this scope

/** @file bits/c++0x_warning.h
* This is an internal header file, included by other library headers.
* Do not attempt to use it directly. @headername{iosfwd}
*/

code is..
#include<iostream>
#include<array>
#include<iomanip>
using namespace std;

int main()
{
array<int, 5> n;

for(size_t i=0; i<n.size(); ++i)
{
n[i]=0;

}
cout<<"Element"<<setw(10)<<"Value"<<endl;
for(size_t j=0; j<n.size(); ++j)
{
cout<<setw(7)<<j<<setw(10)<<n[j]<<endl;
}

}