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.GetString(). 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.GetString' : 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.GetString(). 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.GetString' : 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.

    return returnedStr.c_str()[0];
 

Raghuram