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