There is no such function and you got "unresolved symbol" errors.
Or there is a function, but you saw
- all your strings quickly => you just got the scaling factor on your delay parameter wrong.
- nothing at all for a minute, then all the output you were expecting => use std::flush.
Posting you C++ attempt rather than the Python you cribbed from would have been more useful.
using namespace std;
int a = 60;
cout<< "Ready to Count Down:";
sleep(1); // "Use of undeclared identifier 'sleep'" ERROR.