cin >> phone;

[savant11]

Hoi allen,

heb dit

#ifndef PHONENUMBER_H
#define PHONENUMBER_H

#include <iostream>
#include <string>
#include <iomanip>

using namespace std;

class Phonenumber
{
	friend ostream &operator << (ostream &, const Phonenumber &);
	friend istream &operator << (istream &, Phonenumber &);


public:
	string areaCode;
	string exchange;
	string line;
};

#endif

#include "stdafx.h"
#include "Phonenumber.h"
#include <iomanip>
//#include <iostream>
//#include <string>

using namespace std;

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

istream &operator <<(istream &input, Phonenumber &number)
{
	input.ignore();
	input >> setw(3)>> number.areaCode;
	input.ignore(2);
	input >> setw(3) >> number.exchange;
	input.ignore();
	input >> setw(4) >> number.line;

	getchar();
	return input;


}

// Phonenumber.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
#include "Phonenumber.h"

using namespace std;


int main()
{

	Phonenumber phone;

	cout << "Enter phonenumber" << endl;

	cin << phone;

	cout << "The phonenumber u entered was: ";


	cout << phone << endl;
	getchar();
	return 0;
	getchar();
}

Maar nu heb ik dus: cin << phone; Dat werkt. Maar normaal moet zijn cin >> phone;?? toch?

Want als ik doe: cin >> phone; krijg ik de error: Error 1 error C2679: binary '>>' : no operator found which takes a right-hand operand of type 'Phonenumber' (or there is no acceptable conversion) c:\users\savantking\documents\visual studio 2008\projects\pointer2\phonenumber\test.cpp 18 Phonenumber


Hoe kan dit?

Ik gebruik: MVS(visual studio). Is dit een bug?

THX!!

 

[Supersnail]

Normaal gesproken wel. Dat het in dit geval anders werkt komt doordat in de klasse "Phonenumber" de '<<' operator zowel voor invoer als voor uitvoer is gedefinieerd:
[cpp]friend ostream &operator << (ostream &, const Phonenumber &); //uitvoer
friend istream &operator << (istream &, Phonenumber &); //invoer[/cpp]

Als je dit wilt veranderen in de "normale" manier moet je
[cpp]friend istream &operator << (istream &, Phonenumber &);[/cpp]
veranderen in
[cpp]friend istream &operator >> (istream &, Phonenumber &);[/cpp]
en
[cpp]istream &operator <<(istream &input, Phonenumber &number)[/cpp]
veranderen in
[cpp]istream &operator >>(istream &input, Phonenumber &number)[/cpp]

Ik heb het overigens niet getest, maar dat zou moeten werken.

 

[savant11]

Hoi Supersnail,

THX!! man.

It works!!