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STL :: std::array<> in c++

Example:       

  int a[5] = {10,20,30,40,50};

 array b;

 std:copy(std::begin(a),std::end(a),std::begin(b));

for(int x : b)
{
cout<
}

cout<<"begin functional iterator : "<
for(auto val = b.begin(); val
cout<<*val<
cout<<"R begin functional iterator : "<
for(auto val = b.rbegin(); val
cout<<*val<

 cout<<"AT Function : "<
cout<<"at(2) : "<

 cout<<"front Function : "<
cout<<"front() : "<
cout<<"back Function : "<
cout<<"back() : "<
cout<<"[] operator : "<
cout<<"b[2] : "<
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