Assigning const std::string to std::string in c++

Question

I am trying to assign a const std::string variable to std::string variable.But getting some memory related error. code is like below:

#include <iostream>
#include <string>

using namespace std;
std::string sender1;

std::string fun()
{
      const std::string sender = "hi";
       sender1.assign(sender);
      
}

int main()
{
    fun();
    cout<<sender1<<endl;
    return 0;   
}

Answer 1

You've forgotten a return in fun. If you change that function like this:

std::string fun()
{
    const std::string sender = "hi";
    sender1.assign(sender);
    return sender;
}

then the code will compile and run fine.

Answer 2

I got the answer finally.

We need to declare a char * globally. Then using const_cast <char *> we can convert the constant string to char and assign it.

Example: in .h file:

char * abc;

in .cc file:

func()
{
 const std::string cde = "Hello";
 //now to use this constant string in another function,we use const cast and 
 //assign it to abc like below
 abc = const_cast <char *>(cde.c_str());
}