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C++ string用法

// 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(alls+6, alls + 10); // ctor #6 cout << six << "
, "; string seven(&five[6], &five[10]); // ctor #6 again cout << seven << "...\n"; string eight(four, 7, 16); // ctor #7 cout << eight << " in motion!" << endl; // std::cin.get(); return 0; }