1. Program list
str1.cpp
// str1.cpp -- introducing the string class
#include <iostream>
#include <string>
// using string constructors
int main()
{
using namespace std;
string one("Lottery Winner!"); // ctor #1
cout << one << endl; // overloaded <<
string two(20, '$'); // ctor #2
cout << two << endl;
string three(one); // ctor #3
cout << three << endl;
one += " Oops!"; // overloaded +=
cout << one << endl;
two = "Sorry! That was ";
three[0] = 'P';
string four; // ctor #4
four = two + three; // overloaded +, =
cout << four << endl;
char alls[] = "All's well that ends well";
string five(alls, 20); // ctor #5
cout << five << "!\n";
string six