Article ID: 158204 - Last Review: December 1, 2003 - Revision: 4.0

INFO: STL Sample for the string::operator>> Function

This article was previously published under Q158204
NOTE: Microsoft Visual C++ NET (2002) supported both the managed code model that is provided by the .NET Framework and the unmanaged native Windows code model. The information in this article applies to unmanaged Visual C++ code only.

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SUMMARY

The sample code below illustrates how to use the string::operator>> STL function in Visual C++.

MORE INFORMATION

Required Header

   <string>
				

Prototype

   template<class E, class TYPE, class A> inline
   basic_istream<E, TYPE>&
   operator>>(basic_istream<E, TYPE>& InStream,
              basic_string<E, TYPE, A>& String);
				
NOTE: The class/parameter names in the prototype may not match the version in the header file. Some have been modified to improve readability.

Description

The operator>> is used to populate a string with the contents of an input stream.

Sample Code

////////////////////////////////////////////////////////////////////// 
// 
// Compile options needed: /GX
// 
// StringExtract.cpp : Illustrates how to use the operator>> to extract
//                     a string from an input stream, populating a string
//                     variable with the contents.
// 
// Functions:
// 
//    operator>>  Extracts a string from an input stream.
// 
// Written by Derek Jamison
// of Microsoft Product Support Services,
// Copyright (c) 1996 Microsoft Corporation. All rights reserved.
////////////////////////////////////////////////////////////////////// 

#pragma warning(disable:4786)
#include <string>
#include <iostream>

#if _MSC_VER > 1020   // if VC++ version is > 4.2
   using namespace std;  // std c++ libs implemented in std
   #endif

void main()
{
    string s1;
    cout << "Enter a word: ";
    cin >> s1;
    cout << endl << "You entered: " << s1;
}
				
Program Output is:

Enter a word: Sample
You entered: Sample

REFERENCES

Visual C++ Books On Line: Visual C++ Books:C/C++:Standard C++ Library Reference.

APPLIES TO
  • The Standard C++ Library, when used with:
    • Microsoft Visual C++ 4.2 Enterprise Edition
    • Microsoft Visual C++ 4.2 Professional Edition
    • Microsoft Visual C++ .NET 2002 Standard Edition
  • Microsoft Visual C++ .NET 2003 Standard Edition
Keywords: 
kbinfo kbtemplate kbstl kbcode KB158204
 

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