Calling a function returns error C2662. Help?

[TheMan1]

Hi, I'm making a simple program in C++.
I have an object named TextReader, with a function GetString(), and I also have another object, TextWriter.
Now when *TextWriter is called, it needs to return a character. It will get this character from TextReader.GetS tring(). However, I get an error C2662 when I try to implement this.
Here is my dereference operator function for TextWriter:

char TextWriter::operator*() const
{
	string tmpStr;
	tmpStr += firstChar;	//Convert field firstChar to a 1-char string.

	string returnedStr = txtReader.GetString(tmpStr); //Generates error C2662. txtReader is a TextReader object, and a field of TextWriter.

	return returnedStr[0];
}

The error I get is "error C2662: 'TextReader.Get String' : cannot convert 'this' pointer from 'const TextReader' to 'TextReader &'".

How do I resolve this error?

[gpraghuram]

Hi, I'm making a simple program in C++.
I have an object named TextReader, with a function GetString(), and I also have another object, TextWriter.
Now when *TextWriter is called, it needs to return a character. It will get this character from TextReader.GetS tring(). However, I get an error C2662 when I try to implement this.
Here is my dereference operator function for TextWriter:

char TextWriter::operator*() const
{
	string tmpStr;
	tmpStr += firstChar;	//Convert field firstChar to a 1-char string.

	string returnedStr = txtReader.GetString(tmpStr); //Generates error C2662. txtReader is a TextReader object, and a field of TextWriter.

	return returnedStr[0];
}

The error I get is "error C2662: 'TextReader.Get String' : cannot convert 'this' pointer from 'const TextReader' to 'TextReader &'".

How do I resolve this error?

First you should get the cstring from the string and then return the charcter from it like this.
[code=cpp]
return returnedStr.c_s tr()[0];
[/code]

Raghuram