How can I concatenate the data section (private: char crctr;) of a class called

Question

How can I concatenate the data section (private: char crctr;) of a class called Char with the parameter (char c) and return the two characters as a string? I strictly must use string operator+ (char c) format, which is to be an accessor function. So far with my code, I am getting a character plus a somehow converted int form of char c...

#include <string>
#include <iostream>
#include <sstream>

using namespace std;

class Char
{
private:
    char crctr; //data member
public:
    Char(char ch)//constructor with parameter
    {
        crctr=ch;
    }
  
    //accessor
    char toChar()
    {
        return crctr;
    }
  
    string operator+(char c) {return crctr + to_string(c);}
};

int main()
{
    Char cha('A');
    cout << cha.operator+('B') << endl; //result is A66 ??????????????????
  
  
    return 0;
}

#include <string>
#include <iostream>
#include <sstream>

using namespace std;

class Char
{
private:
    char crctr; //data member
public:
    Char(char ch)//constructor with parameter
    {
        crctr=ch;
    }
  
    //accessor
    char toChar()
    {
        return crctr;
    }
  
    string operator+(char c) {return crctr + to_string(c);}
};

int main()
{
    Char cha('A');
    cout << cha.operator+('B') << endl; //result is A66 ??????????????????
  
  
    return 0;
}

Explanation / Answer

#include <string>
#include <iostream>
#include <sstream>

using namespace std;

class Char
{
private:
    char crctr; //data member
public:
    Char(char ch)//constructor with parameter
    {
        crctr=ch;
    }
  
    //accessor
    char toChar()
    {
        return crctr;
    }
  
    string operator+(char c) {return crctr + to_string(c);}
};

int main()
{
    Char cha('A');
    cout << cha.operator+('B') << endl; //result is A66 ??????????????????
  
  
    return 0;
}

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