//string对象的初始化

#include <iostream>

#include <string> //typedef std::basic_string<char> string;

using namespace std;

typedef string String;

int main()

{

    // with no arguments

    string s1;          //默认构造函数：没有参数或参数有默认值

    String s2("hello"); //普通构造函数 String就是string

    s1 = "Anatoliy";    //赋值运算符

    String s3(s1);   //拷贝构造函数 string s3 =s1;

    cout << "s1 is: " << s1 << endl;

    cout << "s2 is: " << s2 << endl;

    cout << "s3 is: " << s2 << endl;

    // first argument C string

    // second number of characters

    string s4("this is a C_sting", );

    cout << "s4 is: " << s4 << endl;

    // 1 - C++ string

    // 2 - start position

    // 3 - number of characters

    string s5(s4, , ); // copy word from s3     cout << "s5 is: " << s5 << endl;

    // 1 - number characters

    // 2 - character itself

    string s6(, '*');

    cout << "s6 is: " << s6 << endl;

    // 1 - start iterator(迭代器 )

    // 2 - end iterator(迭代器 )

    string s7(s4.begin(), s4.end() - );

    cout << "s7 is: " << s7 << endl;

    // 通过=初始化string对象

    string s8 = "Anatoliy";

    cout << "s8 is: " << s8 << endl;

    string s9 = s1 + "hello"+ s2;    //s1 + "hello"+ s2的结果是string类型的对象(变量)

    cout << "s9 is: " << s9 << endl;

    return ;

}