// This program demonstrates two overloaded operators:
// overloaded assignment, and overloaded output

#include <iostream>
#include <cstring>
using std::ostream;

class string {
public:
  string() : buf( new char[1]) {
    buf[0] = '\0';
  }
  string(int n) : buf(new char[n+1]) {} 
  string(const char* s) : buf(new char[strlen(s)+1]) {
    strcpy(buf, s);
  }
  string(const string& s) : buf(new char[s.size()+1]) {
    strcpy(buf, s.buf);
  }
  int size() const { return strlen(buf); }
  const char* getBuf() const { return buf; }
  void setBuf(const char* b) {
    delete [] buf;
    buf = new char[strlen(b)+1];
    strcpy(buf, b);
  }
  const string& operator=(const string& rhs) {
    if (&rhs != this) {
      setBuf(rhs.buf);
    }
    return *this;
  }
private:
  char *buf;
};
ostream& operator<<(ostream &lhs, const string &s) { return lhs << s.getBuf(); }

int main() {
  string dog("dog");
  string x;
  x = dog;
  dog.setBuf("Abraham Lincoln");
  std::cout << x << std::endl;
}