steva
asked on
Errors in simple C++ program with Visual Studio 2010 Express
Can someone tell me why I'm getting the errors below for the simple C++ program shown?
#include "stdafx.h"
#include <tchar.h>
#include <iostream>
#using <mscorlib.dll>
#using <System.dll>
#using <System.xml.dll>
using namespace System;
using namespace System::Xml;
void main(void)
{
XmlTextReader^ reader = gcnew XmlTextReader ("books.xml");
cout << reader->Read() ;
}
------ Build started: Project: Q815658, Configuration: Debug Win32 ------
Q815658.cpp
Q815658.cpp(17): error C2065: 'cout' : undeclared identifier
Q815658.cpp(17): warning C4804: '<<' : unsafe use of type 'bool' in operation
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
Thanks for your help...
#include "stdafx.h"
#include <tchar.h>
#include <iostream>
#using <mscorlib.dll>
#using <System.dll>
#using <System.xml.dll>
using namespace System;
using namespace System::Xml;
void main(void)
{
XmlTextReader^ reader = gcnew XmlTextReader ("books.xml");
cout << reader->Read() ;
}
------ Build started: Project: Q815658, Configuration: Debug Win32 ------
Q815658.cpp
Q815658.cpp(17): error C2065: 'cout' : undeclared identifier
Q815658.cpp(17): warning C4804: '<<' : unsafe use of type 'bool' in operation
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
Thanks for your help...
or maybe specify the std lib like this
std::cout << reader->Read() ;
what is reader->Read() ; doing? is that expecting input?
std::cout << reader->Read() ;
what is reader->Read() ; doing? is that expecting input?
ASKER
Actually,I made a mistake. The code should be:
void main(void)
{
XmlTextReader^ reader = gcnew XmlTextReader ("books.xml");
reader->Read() ; // read the file
cout << reader->Value;
}
But no matter, the cout still doesn't compile. If I change the #include to <iostream.h> the build says it can't fine iostream.h. At std::cout doesn't work either.
"reader" here is an XmlTextReader object frm .NET that reads the next node of the xml file "books.xml."
void main(void)
{
XmlTextReader^ reader = gcnew XmlTextReader ("books.xml");
reader->Read() ; // read the file
cout << reader->Value;
}
But no matter, the cout still doesn't compile. If I change the #include to <iostream.h> the build says it can't fine iostream.h. At std::cout doesn't work either.
"reader" here is an XmlTextReader object frm .NET that reads the next node of the xml file "books.xml."
ASKER CERTIFIED SOLUTION
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ASKER
Nope. Putting
using namespace std;
after the includes doesn't make any difference. cout is still an "undeclared identifier."
using namespace std;
after the includes doesn't make any difference. cout is still an "undeclared identifier."
ASKER
Ah! Got it.
cout requires the two statements
#include <iostream>
using namespace std;
But even then I can't write
cout << reader->Value;
because the thing in the .NET reader->Value is not a string.
After adding
#include <iostream>
using namespace std;
and changing that line to
cout << "A string";
I compile ok. So I'm still not sure how to display what's in reader->Value but at least the build problem is solved. Thanks for your help. I gave you the points for working with me on it.
cout requires the two statements
#include <iostream>
using namespace std;
But even then I can't write
cout << reader->Value;
because the thing in the .NET reader->Value is not a string.
After adding
#include <iostream>
using namespace std;
and changing that line to
cout << "A string";
I compile ok. So I'm still not sure how to display what's in reader->Value but at least the build problem is solved. Thanks for your help. I gave you the points for working with me on it.
ASKER
Solved it myself, though the dialog with rockiroads was helpful.
Hi Steva. Went to bed soon after last posting.
So what did you do when you solved it. Did you assign reader->value to a string variable then outputted that variable?
So what did you do when you solved it. Did you assign reader->value to a string variable then outputted that variable?
ASKER
The magic combination to get cout to be recognized was
#include <iostream>
using namespace std;
or
#include <iostream>
std::cout
iostream.h doesn't work.
But even after that the combination of cout and reader->Value didn't work because the .NET reader->Read() function put something into reader.Value that wasn't compatible with the type of string that cout was expecting. I ended up using String^ s = reader.Value.
By the way, I posted two more questions on .NET and Visual Studio Express at
https://www.experts-exchange.com/questions/26497579/Is-there-an-XMLTextReader-without-NET.html
and
https://www.experts-exchange.com/questions/26496756/Converting-a-Visual-C-6-0-MFC-application-to-Visual-Studio-2010.html
if you have time and feel like looking at them.
Steve
#include <iostream>
using namespace std;
or
#include <iostream>
std::cout
iostream.h doesn't work.
But even after that the combination of cout and reader->Value didn't work because the .NET reader->Read() function put something into reader.Value that wasn't compatible with the type of string that cout was expecting. I ended up using String^ s = reader.Value.
By the way, I posted two more questions on .NET and Visual Studio Express at
https://www.experts-exchange.com/questions/26497579/Is-there-an-XMLTextReader-without-NET.html
and
https://www.experts-exchange.com/questions/26496756/Converting-a-Visual-C-6-0-MFC-application-to-Visual-Studio-2010.html
if you have time and feel like looking at them.
Steve
does it make a difference if you change
#include <iostream>
to
#include <iostream.h>