#include <iostream>
#include <cstdlib>
#include <string>   //for class string
using namespace std;

int main()
{
	string s = "Hello there";   //one-argument constructor

	cout << "s.size() == " << s.size() << "\n"           //instead of strlen
		<< "The 1st character is '" << s[0] << "'.\n"    //s.operator[](0)
		<< "The next 3 characters are \"" << s.substr(1, 3) << "\".\n"
		<< "The last character is '" << s[s.size() - 1] << "'.\n\n";

	cout << "Please type your name and press RETURN: ";
	string word;   //No-argument constructor puts null string into object.
	cin >> word;   //Input 1 word like scanf(%s; string expands to hold it.

	string line = s + ", " + word + "!  ";
	line += "How are you?"; //instead of strcat: line.operator+=("How RU?");
	cout << line << "\n\n";

	if (s < line) {     //instead of strcmp: if (operator<(s, line)) {
		line = s;       //instead of strcpy: line.operator=(s);
	}

	for (string::const_iterator it = s.begin(); it != s.end(); ++it) {
		cout << *it;
	}
	cout << "\n\n";

	string::size_type i = s.find('l');         //instead of strchr
	if (i == string::npos) {                   //"no position"
		cout << "The string \"" << s << "\" does not contain 'l'.\n";
	} else {
		cout << "Found the first 'l' at position " << i << ".\n";
	}

	i = s.find("lo");                          //instead of strstr
	if (i == string::npos) {                   //"no position"
		cout << "The string \"" << s << "\" does not contain \"lo\".\n";
	} else {
		cout << "Found the first \"lo\" at position " << i << ".\n";
	}

	//char *p = s;               //won't compile
	//char *p = s.c_str();       //won't compile
	const char *p = s.c_str();   //will compile: pointer must be read-only

	s[0] = '\0';
	return EXIT_SUCCESS;
}