take in a string

I have a function that prints a bunch of junk, then leaves it up to the user to determine what they want to do next. I want them to type in the string "run hello.exe" and then whenever they type in something other than that, I want the program to say "Bad command" and keep doing that until the user types the correct string. How should I go about this?

--Thanks

Code:

---

#include <string>
#include <iostream>
using namespace std;

//...

string input;

getline(cin, input);

while (input != "run hello.exe")
{
    cout << "Bad command" << endl;
    getline(cin, input);
}

---

Something like that should work.