//string.cpp
///by tsaiwn@csie.nctu.edu.tw
#include<iostream>
#include<string>
 //////// 以上要新版 C++ 才能用 !!!
////////  C++ 字串 不同於 C
/////////// 以下是 C 的東東
extern "C"{
   #include<stdio.h>
   #include<string.h>
}
using namespace std; //////////////
int main()
{   char t[80];
    string x("I am a string.");
    cout << "x=" << x << endl;
    cout << "do strcpy(t, x.c_str() );" << endl;
    strcpy(t, x.c_str() );   //轉成 C 的字串
    printf("t=%s\n", t);
    printf(" length of t=%d\n", strlen(t));
    string y(t);  // 再轉成 C++ 字串看看

    cout << "do  string y(t);  " << endl;

    cout << "C++ String y=" << y << endl;
    cout << "it's size= y.size() = " << y.size() << endl;

    cout << " y = y + \" Do you get it?\";  " << endl;

    y = y + " Do you get it?";

    cout << "new y=" << y << endl;
    cout << "new size=" << y.size() << endl;
}