Code::Blocks c++ 11 flags

I need to perform Circular Right Shift in my program and I am doing it the following way :-

int a = 425;

int q = a / 10;
int r = a % 10;

string t = to_string(q);
string s = to_string(r);

int newnum = stoi(s+t);

cout<<newnum<<endl;

It is working on my terminal after I include -std=c++11 flag but when i tried it in Code::Blocks it wasn't working so i checked this Settings -> Compiler ->"Have g++ follow the C++11 ISO C++ language standard [-std=c++11]" but it is still giving me the error "to_string was not declared in this scope".