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Error C2678: binary '!=': no operator found...

Hello all.

I'm doing some basic work with C++ streams on MS Visual Studio 2015, and I am encountering error C2678 when I attempt to compile this code:

#include <iostream>

using namespace std;

int main()
{
	char ch;
	cout << "enter a phrase: ";
	while ( cin.get(ch) != 0 )
	{
		if (ch == '!')
			cin.putback('$');
		else
			cout << ch;
		while (cin.peek() == '#')
			cin.ignore(1, '#');
	}
	return 0;
}

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For line 9, I receive this error output:
C2678      binary '!=': no operator found which takes a left-hand operand of type 'std::basic_istream<char,std::char_traits<char>>' (or there is no acceptable conversion)

Many thanks in advance!
0
blossompark
Asked:
blossompark
  • 3
2 Solutions
 
phoffricCommented:
According to this link, you are using a form of get that returns basic_istream& and I did not find a != operator that addresses a LHS of basic_istream& and a RHS of int.
http://www.cplusplus.com/reference/istream/basic_istream/get/

The revised while test condition should get your program to build.
But you still have a peek to deal with when you reach the EOF. Here is one approach. Adding in a test for EOF in a peek() allows your program to run smoothly in VS until you hit the eof state. At that point, to emulate an eof in the Visual Studio console, you type in the single char, ctrl/Z, followed by the <ENTER>, at which point you hit the break and your program ends.
	while (cin.get(ch) )
	{
		if (cin.peek() == std::char_traits<char>::eof())
			break;

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or you can combine these three lines as follows:
	while( ( ch = cin.get() ) != std::char_traits<char>::eof() )

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0
 
phoffricCommented:
Just curious - I see that you just started C++ questions after a good deal of DB questions. Did you volunteer to take on new projects where you have to figure this stuff out?
0
 
blossomparkAuthor Commented:
Thank you, it worked like a charm.

And, I'm actually borrowing this account at the moment. The DB questions aren't mine (though I hope to work my way through that subject as well!)

Many thanks.
0
 
phoffricCommented:
I think that you can create your own account for free and ask your own questions for free. There is also a premium membership that gives you extra privileges.
0

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