流的使用之三：字符串的使用    作者:xieaotian发表于2009-05-22 15:48:35

	   

	   字符串string的主要操作，除了字符串流stringstream。同时大部分操作也适用于其它STL容器如vector、list等



 char a[] = "TELEPHONE_NUMBKER";

 string str, str1("0123456789"), str2 (a), str3 (a, a + 9),

  str4 (str3.begin () + 1, str3.end () - 2); //四种string初始化方法

 str = "Jacky56333333Shanghai"; //字符串赋值

 cout << str3 << endl << str4 << endl;



 int i = str.find_first_of (str1); //返回值相当于数组下标

 if (i != string::npos)

  cout << "First number locates in : " << i << endl;

 else

  cout << "NOT FOUND\n";



 str.insert (str.begin (), str1.begin (), str1.end ()); //插入子串

 cout << "insert:\t\t" << str << endl;



 str3 = str;

 str = str.substr (str.find_first_not_of (str1), //返回子串

  str.find_last_not_of (str1) - str.find_first_not_of (str1) + 1);

 cout << "substr From:\t" << str3

  << "\nsubstr Get:\t" << str << endl;



 string::iterator si = search (str.begin (), str.end (), str1.begin () + 5, /*查找子串指针*/ str1.begin () + 6*/str1.end () - 3);

 if (si != str.end ())

  cout << "search:\t\t"  << "FOUND String of first character : " << *si << endl;

 else

  cout << "search:\t\t" << "NOT FOUND\n";



 cout << str.find ("33") << endl; //查找子串位置



 str.replace (str.begin (), str.end (), "abc"); //替代

 cout << "replace:\t\t" << str << endl;



reverse (str.begin (), str.end ()); //翻转

 cout << "reverse:\t" << str << endl;



 sort (str.begin (), str.end ()); //排序

 cout << "sort:\t\t" << str << endl;



 str.erase (str.begin (), str.begin () + 8); //删除

 cout << "erase:\t\t" << str << endl;