How to display the result of function called using object reference in c++ - class

Question

#include "pch.h"
#include <iostream>
#include <cstdlib>
#include <ctime>
#include <stdio.h>
using namespace std;
class LetterDistribution
{
public: char district, trace;
public: int random_num;
public : LetterDistribution(){}
public: LetterDistribution(char dis)
{
district = dis;
trace = 'Z';
}
public: string LetterNumbers()
{
random_num = rand();
string letter_no ( district + " " + random_num);
return letter_no;
}
};
int main()
{
srand(time(0));
cout << "Enter district\n"<<endl;
char dis ;
cin >> dis;
LetterDistribution ld(dis);
cout << ld.LetterNumbers();
return 0;}
I am getting error in second last line inside main "cout << ld.LetterNumbers();". I am new to c++ , I have been working on C# earlier. I shall be thankful if someone could help me .

Answer 1

You have 2 issues in LetterNumbers function:
You can't add to string a number, you should convert the number to string first. you can do so by std::to_string(random_num)
You can't start concatenate string with a character, since character is like number in c++, and adding anything to number is a number. You should start from a string, even an empty one.
So the whole function can be something like:
string LetterNumbers()
{
random_num = rand();
string letter_no ( std::string("") + district + " " + std::to_string(random_num));
return letter_no;
}
Another issues: (but not errors!)
in c++ you can specify public: once, and everything after it is still public, until you change it. same thing for private and protected.
instead of <stdio.h> you should use <cstdio> which is the c++ wrapper for the c header.