string, c_str

int main()
{
        string str = "qwerty";
        char *p = (char*)str.c_str();
        *(p+1) = 'k';
        
        cout << str;
        getch();
        return 0;
}

int main()
{
        char *str = "qwerty";
        char *p = str.c_str();
        *(p+1) = 'k';
        cout << str;
        getch();
        return 0;
}

A->B= 10;
int i=A->B;

A->SetB(10);
int i=A->GetB();

#include <iostream>
#include <string>
int main()
{
  std::string str1 = "str";
  std::string str2 = str1;
 
  std::cout << "str1 = " << str1 << std::endl;
  std::cout << "str2 = " << str2 << std::endl;
 
  char* pStr1 = (char*) str1.c_str();
  pStr1[0] = 'x';
 
  std::cout << "str1 = " << str1 << std::endl;
  std::cout << "str2 = " << str2 << std::endl; // сюрприз
 
  return 0;
}

string str = "12345"

const char *p1 = str.c_str();

str = "abcdef";

const char *p2 = str.c_str();

cout << p1 << '\n' << p2 << endl;

string str = "qwerty";
.............
str = "abcdef";