Valid istream usage? Trying to store an input into 3 different strings

Question

#include <iomanip>
#include "PhoneNumber.h"

ostream &operator << ( ostream &out, const PhoneNumber & number )
{
 out << "(" << number.areaCode << ")" << number.exchange << " - " << number.line;
 return out;
}

istream &operator >> ( istream &in, PhoneNumber &number )
{
    input.scanf("%d-%d-%d", number.areaCode, number.exchange, number.line)
    return in;
}