CPP how to format strings to align to the right side

I am looking for a simple CPP solution to align a string to the right size.

What do I mean by this?
here is an example:

the normal output would be

hello [message]
foo [message]

I would like it to output like this:

 hello [message]
   foo [message]

note: this is not for aligning a table but rather to know how to align a message by adding certain spaces to the left (or smth).

>Solution :

Like this ?

#include <iostream>
#include <iomanip>

int main()
{
    std::cout << std::setw(10) << "Hello" << " [message]" << std::endl ;
    std::cout << std::setw(10) << "foo" << " [message]" << std::endl ;
}