Cin Problem EASY.. HELP

[DN35fSEw]

I am trying to separate input by a comma
cout << "Rectangle: Please enter width and length: " ;
cin >> r.width , r.length; //ERROR <<<<<

Example:
Rectangle: Please enter width and length: 6, 6.34
HELP
thanks

[PiMaster]

char c;
cout << "Rectangle: Please enter width and length:";
cin >> r.width >> c >> r.length;