//string2.cpp  -- @CopyLeft by tsaiwn@csie.nctu.edu.tw
// some useful member functions in the class string
#include <string>
#include <iostream>
using namespace std;
#include <string.h>
int main()
{
    string s("Hello here there!");
    string s2="Hello here there!";
    string t;
    t = s + " How R U doing?";
    cout << "t=" << t << endl;
    cout << "s2=" << s2 << endl;
    cout << "s=" << s << endl;
    cout << " (s==s2) == " << (s==s2) << endl;
    cout << " (s> s2) == " << (s> s2) << endl;
    cout << " (s< s2) == " << (s< s2) << endl;
    cout << " (s> t) == " << (s> t) << endl;
    cout << " (s< t) == " << (s< t) << endl;
    cout << "s.substr(1,3)=" << s.substr(1,3)<<endl;
    cout << "s.substr(6)=" << s.substr(6)<<endl;
    cout << "s.length()=" << s.length()<<endl;
    cout << "s.size()=" << s.size()<<endl;
    s.insert(2,"222");
    cout << "after \"s.insert(2,\"222\"); \n";
    cout << "s=" << s << endl;
    s.erase(2,2);
    cout << "after \"s.erase(2,2); \n";
    cout << "s=" << s << endl;
    cout << "s.find(\"e\") = "; cout << s.find("e") << endl;
    cout << "s.find_last_of(\"e\") = "; cout << s.find_last_of("e") << endl;
    cout << "s.find_last_of(\"here\") = ";
     cout << s.find_last_of("here") << endl;
    cout << "s.find_first_of(\"here\") = ";
     cout << s.find_first_of("here") << endl;
    cout << "string::npos==" << string::npos << endl;
    cout << "s.find(\"E\") = "; cout << s.find("E") << endl;
   string::iterator i;
    for(i= s.begin(); i < s.end(); i++){
       cout << "*i= " << *i << endl;
    }

   char * p;
    p = (char*)s.c_str();
    cout << "p=" << p << endl;
    cout << "strlen(p)=" << strlen(p) << endl;
    cout << "strchr(p, 'e') - p ==" <<  strchr(p,'e')  - p << endl;
  char *cs1="ABCDEFG", *cs2="ABCDE";
    cout << "cs1=" << cs1 << endl;
    cout << "cs2=" << cs2 << endl;
    cout << "strcmp(cs1, cs2) == " << strcmp("ABCDE", "ABCDE")<<endl;

}