basic_string::append

字元加入至字串的結尾。

basic_string<CharType, Traits, Allocator>& append(
    const value_type* _Ptr
);
basic_string<CharType, Traits, Allocator>& append(
    const value_type* _Ptr,
    size_type _Count
);
basic_string<CharType, Traits, Allocator>& append(
    const basic_string<CharType, Traits, Allocator>& _Str,
    size_type _Off,
    size_type _Count
);
basic_string<CharType, Traits, Allocator>& append(
    const basic_string<CharType, Traits, Allocator>& _Str
);
basic_string<CharType, Traits, Allocator>& append(
    size_type _Count, 
    value_type _Ch
);
template<class InputIterator>
    basic_string<CharType, Traits, Allocator>& append(
        InputIterator _First, 
        InputIterator _Last
    );
basic_string<CharType, Traits, Allocator>& append(
    const_pointer _First,
    const_pointer _Last
);
basic_string<CharType, Traits, Allocator>& append(
    const_iterator _First,
    const_iterator _Last
);

參數

• _Ptr
  要附加至的 C 字串。

• _Str
  字元要附加的字串。

• _Off
  來源字串的區段提供字元的索引將會附加至。

• _Count
  從來源字串會附加的，一般而言，字元數。

• _Ch
  要附加的字元值。

• _First
  處理輸入的 Iterator 指向要附加的範圍中的第一個項目。

• _Last
  處理輸入、或 const_pointer Iterator 的位置 const_iterator 該在最後一個項目以外要附加的範圍。

傳回值

在附加至成員函式傳遞的字元的字串物件的參考。

備註

使用 operator+= 或成員函式 append 或 push_back，字元可附加至字串。 ，當多個引數 append 成員函式允許字串中特定組件的加入時，指定operator+= 附加單一引數值。

範例

// basic_string_append.cpp
// compile with: /EHsc
#include <string>
#include <iostream>

int main( ) 
{
   using namespace std;

   // The first member function
   // appending a C-string to a string
   string str1a ( "Hello " );
   cout << "The original string str1 is: " << str1a << endl;
   const char *cstr1a = "Out There ";
   cout << "The C-string cstr1a is: " << cstr1a << endl;
   str1a.append ( cstr1a );
   cout << "Appending the C-string cstr1a to string str1 gives: " 
        << str1a << "." << endl << endl;

   // The second member function
   // appending part of a C-string to a string
   string str1b ( "Hello " );
   cout << "The string str1b is: " << str1b << endl;
   const char *cstr1b = "Out There ";
   cout << "The C-string cstr1b is: " << cstr1b << endl;
   str1b.append ( cstr1b , 3 );
   cout << "Appending the 1st part of the C-string cstr1b "
        << "to string str1 gives: " << str1b << "." 
        << endl << endl;

   // The third member function
   // appending part of one string to another
   string str1c ( "Hello " ), str2c ( "Wide World " );
   cout << "The string str2c is: " << str2c << endl;
   str1c.append ( str2c , 5 , 5 );
   cout << "The appended string str1 is: " 
        << str1c << "." << endl << endl;

   // The fourth member function
   // appending one string to another in two ways,
   // comparing append and operator [ ]
   string str1d ( "Hello " ), str2d ( "Wide " ), str3d ( "World " );
   cout << "The  string str2d is: " << str2d << endl;
   str1d.append ( str2d );
   cout << "The appended string str1d is: " 
        << str1d << "." << endl;
   str1d += str3d;
   cout << "The doubly appended strig str1 is: " 
        << str1d << "." << endl << endl;

   // The fifth member function
   // appending characters to a string
   string str1e ( "Hello " );
   str1e.append ( 4 , '!' );
   cout << "The string str1 appended with exclamations is: " 
        << str1e << endl << endl;

   // The sixth member function
   // appending a range of one string to another
   string str1f ( "Hello " ), str2f ( "Wide World " );
   cout << "The string str2f is: " << str2f << endl;
   str1f.append ( str2f.begin ( ) + 5 , str2f.end ( ) - 1 );
   cout << "The appended string str1 is: " 
        << str1f << "." << endl << endl;
}

需求

標題: <string>

命名空間: std

請參閱

參考

basic_string Class

basic_string::append (STL Samples)