C++ code not asking for input despite cin

#include
using namespace std;
int main() {
string previous ="";
string current;
while (cin>>current){
if (previous==current)
cout<<“Repeated Word:”
<<current<<’\n’;
previous=current;
}
return 0;
}

The above code does not ask for any input which I expect as the program contains cin. Also, all it shows is successfully executed. Without asking for any input, how that can be?

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