basic_string::append

Adds characters to the end of a string.

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
);

Parameters

• _Ptr
  The C-string to be appended.

• _Str
  The string whose characters are to be appended.

• _Off
  The index of the part of the source string supplying the characters to be appended.

• _Count
  The number of characters to be appended, at most, from the source string.

• _Ch
  The character value to be appended.

• _First
  An input iterator addressing the first element in the range to be appended.

• _Last
  An input iterator, const_pointer, or const_iterator addressing the position of the one beyond the last element in the range to be appended.

Return Value

A reference to the string object that is being appended with the characters passed by the member function.

Remarks

Characters may be appended to a string using the operator+= or the member functions append or push_back. operator+= appends single-argument values while the multiple-argument append member function allows a specific part of a string to be specified for adding.

Example

// 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;
}

The original string str1 is: Hello 
The C-string cstr1a is: Out There 
Appending the C-string cstr1a to string str1 gives: Hello Out There .

The string str1b is: Hello 
The C-string cstr1b is: Out There 
Appending the 1st part of the C-string cstr1b to string str1 gives: Hello Out.

The string str2c is: Wide World 
The appended string str1 is: Hello World.

The  string str2d is: Wide 
The appended string str1d is: Hello Wide .
The doubly appended strig str1 is: Hello Wide World .

The string str1 appended with exclamations is: Hello !!!!

The string str2f is: Wide World 
The appended string str1 is: Hello World.

Requirements

Header: <string>

Namespace: std

See Also

Reference

basic_string Class

basic_string::append (STL Samples)

Other Resources

basic_string Members