C++ File I/O in Visual Studio .NET

Printer QR Code 2d barcode in Visual Studio .NET C++ File I/O

C++ File I/O
Making QR Code In .NET
Using Barcode printer for Visual Studio .NET Control to generate, create QR Code JIS X 0510 image in .NET framework applications.
Denso QR Bar Code Recognizer In VS .NET
Using Barcode scanner for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
else if(i cout << else if(i cout << }
Print Bar Code In .NET Framework
Using Barcode printer for .NET framework Control to generate, create barcode image in Visual Studio .NET applications.
Scan Bar Code In .NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in .NET applications.
& ios::failbit) "Non-Fatal I/O error\n"; & ios::badbit) "Fatal I/O error\n";
Print QR Code In Visual C#
Using Barcode maker for .NET framework Control to generate, create QR Code JIS X 0510 image in Visual Studio .NET applications.
Generate QR In Visual Studio .NET
Using Barcode generation for ASP.NET Control to generate, create Quick Response Code image in ASP.NET applications.
This program will always report one "error" After the while loop ends, the final call to checkstatus( ) reports, as expected, that an EOF has been encountered You might find the checkstatus( ) function useful in programs that you write The other way that you can determine if an error has occurred is by using one or more of these functions:
Print QR Code JIS X 0510 In Visual Basic .NET
Using Barcode generator for .NET framework Control to generate, create QR Code image in Visual Studio .NET applications.
Draw Bar Code In Visual Studio .NET
Using Barcode maker for .NET framework Control to generate, create barcode image in VS .NET applications.
bool bad( ); bool eof( ); bool fail( ); bool good( ); The bad( ) function returns true if badbit is set The eof( ) function was discussed earlier The fail( ) returns true if failbit is set The good( ) function returns true if there are no errors Otherwise, it returns false Once an error has occurred, it may need to be cleared before your program continues To do this, use the clear( ) function, which has this prototype: void clear(iostate flags=ios::goodbit); If flags is goodbit (as it is by default), all error flags are cleared Otherwise, set flags as you desire
Printing UPC - 13 In .NET
Using Barcode generator for Visual Studio .NET Control to generate, create EAN-13 Supplement 5 image in .NET framework applications.
Linear Barcode Creator In .NET
Using Barcode creator for .NET framework Control to generate, create Linear 1D Barcode image in Visual Studio .NET applications.
Customized I/O and Files
Code 3/9 Printer In .NET
Using Barcode printer for .NET Control to generate, create Code 3/9 image in VS .NET applications.
Standard 2 Of 5 Encoder In VS .NET
Using Barcode maker for VS .NET Control to generate, create Standard 2 of 5 image in VS .NET applications.
In 20 you learned how to overload the insertion and extraction operators relative to your own classes In that chapter, only console I/O was performed, but because all C++ streams are the same, you can use the same overloaded inserter or extractor function to perform I/O on the console or a file with no changes whatsoever As an example, the following program reworks the phone book example in 20 so that it stores a list on disk The program is very simple: It allows you to add names to the list or to display the list on the screen It uses custom inserters and extractors to input and output the telephone numbers You might find it interesting to enhance the program so that it will find a specific number or delete unwanted numbers
Barcode Printer In Java
Using Barcode generator for Java Control to generate, create bar code image in Java applications.
Reading Barcode In Java
Using Barcode scanner for Java Control to read, scan read, scan image in Java applications.
C++: The Complete Reference
Making Code 3/9 In None
Using Barcode generator for Microsoft Word Control to generate, create Code 3/9 image in Microsoft Word applications.
Code128 Generation In None
Using Barcode generator for Online Control to generate, create Code 128 Code Set A image in Online applications.
#include <iostream> #include <fstream> #include <cstring> using namespace std; class phonebook { char name[80]; char areacode[4]; char prefix[4]; char num[5]; public: phonebook() { }; phonebook(char *n, char *a, char *p, char *nm) { strcpy(name, n); strcpy(areacode, a); strcpy(prefix, p); strcpy(num, nm); } friend ostream &operator<<(ostream &stream, phonebook o); friend istream &operator>>(istream &stream, phonebook &o); }; // Display name and phone number ostream &operator<<(ostream &stream, phonebook o) { stream << oname << " "; stream << "(" << oareacode << ") "; stream << oprefix << "-"; stream << onum << "\n"; return stream; // must return stream } // Input name and telephone number istream &operator>>(istream &stream, phonebook &o) { cout << "Enter name: "; stream >> oname; cout << "Enter area code: "; stream >> oareacode; cout << "Enter prefix: "; stream >> oprefix; cout << "Enter number: ";
EAN / UCC - 14 Drawer In Visual C#
Using Barcode printer for .NET Control to generate, create EAN / UCC - 14 image in .NET framework applications.
Code 128A Decoder In Visual Basic .NET
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET applications.
21:
UCC.EAN - 128 Encoder In Java
Using Barcode maker for Java Control to generate, create EAN128 image in Java applications.
UPC A Drawer In Java
Using Barcode creator for Android Control to generate, create Universal Product Code version A image in Android applications.
C++ File I/O
stream >> onum; cout << "\n"; return stream; } int main() { phonebook a; char c; fstream pb("phone", ios::in | ios::out | ios::app); C++ if(!pb) { cout << "Cannot open phone book file\n"; return 1; } for(;;) { do { cout << "1 Enter numbers\n"; cout << "2 Display numbers\n"; cout << "3 Quit\n"; cout << "\nEnter a choice: "; cin >> c; } while(c<'1' || c>'3'); switch(c) { case '1': cin >> a; cout << "Entry is: "; cout << a; // show on screen pb << a; // write to disk break; case '2': char ch; pbseekg(0, ios::beg); while(!pbeof()) { pbget(ch); if(!pbeof()) cout << ch; } pbclear(); // reset eof cout << endl;
C++: The Complete Reference
break; case '3': pbclose(); return 0; } } }
Notice that the overloaded << operator can be used to write to a disk file or to the screen without any changes This is one of the most important and useful features of C++'s approach to I/O
Copyright © OnBarcode.com . All rights reserved.