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| damzeta (1) |  |
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Hello senior2, I'm still dummy in C++. There are something that i want to ask. There is a little program my lecturer gave. #include <iostream.h> #include <iomanip.h> class PhoneNumber { friend ostream &operator<<( ostream&, const PhoneNumber & ); (***) friend istream &operator>>( istream&, PhoneNumber & ); (***) private: char areaCode[ 4 ]; char exchange[ 4 ]; char line[ 5 ]; }; ostream &operator<<( ostream &output, const PhoneNumber &num ) (***) { output << "(" << num.areaCode << ") " (***) << num.exchange << "-" << num.line; (***) return output; } istream &operator>>( istream &input, PhoneNumber &num ) (***) { input.ignore(); (***) input >> setw( 4 ) >> num.areaCode; (***) input.ignore( 2 ); (***) input >> setw( 4 ) >> num.exchange; (***) input.ignore(); (***) input >> setw( 5 ) >> num.line; (***) return input; (***) } void main() { PhoneNumber phone; // create object phone cout << "Enter phone number in the form (123) 456-7890:\n"; cin >> phone; cout << "The phone number entered was: "; cout << phone << endl; (***) } Please give a comment or explanation in the line that i noted with (***), because i don't understand. For line that un-noted, I already knew teh meaning of that line. Thanks before for the answer Senior... | |||
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| jsmith (5804) | |
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In other words, you know nothing about the problem since you've marked virtually every line. I would suggest starting by reading up on C++ syntax. | |
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[ASK] C++ about friend function