#include <iostream>
using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char** argv) {
	//1.C++ 字串 成員函式
	string a1 = "happy birthday";
	string * a2 = new string("happy birthday");

	//o	（6）string& append (const string& str); / +=
	//將 str 串接到物件目前內容的最後面。
	cout<<" a1 = "<<a1<<endl;
	a1.append(" to you");
	//會修改原a1內容 
	cout<<" a1 = "<<a1<<endl;
	
	a1 += " to you"; 
	cout<<" a1 = "<<a1<<endl;
	
	a2->append(" to you");
	cout<<" *a2 = "<<*a2<<endl;
	
	*a2 += " to you"; 
	cout<<" *a2 = "<<*a2<<endl;
	
	//o	（1）string& insert (size_t pos, const string& str);
	//在物件目前內容 pos 的位置，插入 str 。
	a1 = "happy birthday";	
	a1.insert(a1.size(), " to you");
	cout<<"\n a1 = "<<a1<<endl;
	
	a2->assign("happy birthday");
	cout<<" *a2 = "<<*a2<<endl;
	a2->insert(a2->size(), " to you");
	cout<<" *a2 = "<<*a2<<endl;
	
	//o	（1）string& erase (size_t pos = 0, size_t len = npos);
	//把物件目前內容中從 pos 開始，長度 len 的內容?除。
	a1 = "happy birthday";
	//刪除全部
	a1.erase();
	cout<<"\n a1 = "<<a1<<endl;
	//刪除部分
	a1 = "happy birthday";
	a1.erase(0, 5);
	cout<<"a1 = "<<a1<<endl;
	
	a2->assign("happy birthday");
	cout<<" *a2 = "<<*a2<<endl;
	a2->erase(0, 5); 
	cout<<" *a2 = "<<*a2<<endl;
	
	 
	//o	（1）string& replace (size_t pos, size_t len, const string str);
	//用 str 取代物件目前內容中，從 pos 開始長度 len 的內容。
	a1 = "happy birthday";
	a1.replace(0, 4, "great");
	cout<<"\na1 = "<<a1<<endl;
	
	a2->assign("happy birthday");
	cout<<" *a2 = "<<*a2<<endl;
	a2->replace(0, 4, "great");
	cout<<" *a2 = "<<*a2<<endl;
	
	//o	（1）size_t find (const string& str, size_t pos = 0) const;
	//從 pos 開始，找出 str 第一次出現的位置。
	//若不存在，值為 string::npos(-1) 。
	a1 = "happy birthday";
	int n1 = a1.find("bir");
	cout<<"\nbir location = "<<n1<<endl;
	
	n1 = a1.find("abc");
	cout<<"\nabc location = "<<n1<<endl;
	
	if(n1==-1)cout<<"找不到"<<endl;
	if(n1==string::npos)cout<<"找不到"<<endl;
		
	//o（1）size_t find_first_of (const string& str, size_t pos = 0) const;
	//從 pos 開始，找出 str 中的任何一個字元，第一次出現的位置。若不存在，值為 npos(-1) 。
	
	//o	（1）string substr (size_t pos = 0, size_t len = npos) const;
	//運算出一個新的 stirng 物件，其內容為本物件? pos 開始長度 len 的內容。
	
	//o	（1）int compare (const string& str) const;
	//與 str 比大小。正值、零、負值分別代表大於、等於、小於。


	return 0;
}