// test_string.cpp   just demonstrating some available capabilities

#include <iostream>
#include <string>
using namespace std;

int main()
{
  string s1;
  string s2("Hello.");
  string s3("Hello.", 3);
  string s4(10, '*');
  string s5(5, 'B');
  string s6 = "abc";
  string s7;

  cout << "s1=" << s1 << endl;
  cout << "s2=" << s2 << endl; 
  cout << "s3=" << s3 << endl;
  cout << "s4=" << s4 << endl;
  cout << "s5=" << s5 << endl;
  cout << "s6=" << s6 << endl;
  
  cout << "s2.begin() =" << s2.begin()  << "   s2.end() =" << s2.end() << endl;
  // cout << "s2.rbegin()=" << s2.rbegin() << "   s2.rend()=" << s2.rend()
  //      << endl; // can not print
  cout << "s2.size()  =" << s2.size()   << "   s2.capacity()=" << s2.capacity()
       << endl;
  cout << "s2.length()=" << s2.length() << "   s2.empty()=" << s2.empty()
       << endl;
 
  if (s2 == s3) cout << "bad: says s2 == s3" << endl;
  if (s2 != s3) cout << "OK   s2 != s3" << endl;
  if (s2 > s3)  cout << "s2 > s3" << endl;
  if (s2 >= s3) cout << "s2 >= s3" << endl;
  if (s2 < s3)  cout << "s2 < s3" << endl;
  if (s2 <= s3) cout << "s2 <= s3" << endl;

  s1 = s2 + s5;
  cout << "s1 = s2 + s5, s1=" << s1 << endl;
  
  s6 += s2;
  cout << "s6 += s2, s6=" << s6 << endl;
  
  cout << "s6.compare(s2)=" << s6.compare(s2) << endl;
  cout << "s2.compare(s6)=" << s2.compare(s6) << endl;
  cout << "s2.compare(s2)=" << s2.compare(s2) << endl;
  
  cout << "s2.compare(1,2,s3,1,2)=" << s2.compare(1,2,s3,1,2) << endl;
  
  s1 = s2.substr(2,4);
  cout << "s1 = s2.substr(2,4), s1=" << s1 << endl;
  
  swap(s5,s6); //? not sure this is legal
  cout << "s5=" << s5 << "   s6=" << s6 << endl;
  
  s6.replace(2, 4, s5);
  cout << "s6.replace(2, 4, s5), s6=" << s6 << endl;

  char dumb_str[255];
  cin.getline(dumb_str, 255, '\n');
  s1 = string(dumb_str);
  cout << "cin.getline(dumb_str, max_count, new_line), s1=" << s1 << endl;
  
  return 0;
}

// result of execution:
// s1=
// s2=Hello.
// s3=Hel
// s4=**********
// s5=BBBBB
// s6=abc
// s2.begin() =Hello.   s2.end() =
// s2.size()  =6   s2.capacity()=31
// s2.length()=6   s2.empty()=0
// OK   s2 != s3
// s2 > s3
// s2 >= s3
// s1 = s2 + s5, s1=Hello.BBBBB
// s6 += s2, s6=abcHello.
// s6.compare(s2)=1
// s2.compare(s6)=-1
// s2.compare(s2)=0
// s2.compare(1,2,s3,1,2)=0
// s1 = s2.substr(2,4), s1=llo.
// s5=abcHello.   s6=BBBBB
// s6.replace(2, 4, s5), s6=BBabcHello.
// cin.getline(dumb_str, max_count, new_line), s1=aaa