#include <iostream>

#include <string>

#include <cstring>

using namespace std;

int main()

{

    {

        string s = "tom and jerry";

        const char* c_s = s.c_str();

        cout << "---------------" << endl;

        cout << c_s << endl;

        cout << s << endl;

    }

    {

        const char* c_s = "tom and jerry";

        string s(c_s);

        cout << "---------------" << endl;

        cout << c_s << endl;

        cout << s << endl;

    }

    {

        string s = "tom and jerry";

        char* c;

        const int len = s.length();

        c = new char[len+];

        strcpy(c, s.c_str()); //#include <cstring>

        cout << "---------------" << endl;

        cout << c << endl;

        cout << s << endl;

    }

    {

        char* c = "tom and jerry";

        string s(c);

        cout << "---------------" << endl;

        cout << c << endl;

        cout << s << endl;

    }

    {

        const char* c = "tom and jerry";

        char* pc = new char[];

        strcpy(pc, c);

        cout << "---------------" << endl;

        cout << c << endl;

        cout << pc << endl;

    }

    return ;

}