char_traits::assign

指定的字元值與另一個或對某個範圍的資料。

static void assign( 
   char_type& _CharTo,  
   const char_type& _CharFrom  
); 
static char_type *assign( 
   char_type* _StrTo,  
   size_t _Num,  
   char_type _CharFrom  
);

參數

• **_**CharFrom
  值是指定的字元。

• _CharTo
  要指派字元值的項目。

• _StrTo
  初始項目是指定字元的字串或字元陣列值。

• _Num
  為指定值的元素數目。

傳回值

第二 + 成成員函式指標傳回至第一個 _Num 項目是 _CharFrom 的指派值的字串。

範例

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

int main( ) 
{
   using namespace std;

   // The first member function assigning 
   // one character value to another character
   char ChTo = 't';
   const char ChFrom = 'f';
   cout << "The initial characters ( ChTo , ChFrom ) are: ( "
        << ChTo << " , " << ChFrom << " )." << endl;
   char_traits<char>::assign ( ChTo , ChFrom );
   cout << "After assigning, the characters ( ChTo , ChFrom ) are: ( "
        << ChTo << " , " << ChFrom << " )." << endl << endl;

   // The second member function assigning 
   // character values to initial part of a string
   char_traits<char>::char_type s1[] = "abcd-1234-abcd";
   char_traits<char>::char_type* result1;
   cout << "The target string s1 is: " << s1 << endl;
   result1 = char_traits<char>::assign ( s1 , 4 , 'f' );
   cout << "The result1 = assign ( s1 , 4 , 'f' ) is: "
        << result1 << endl;
}

需求

標頭：<string>

命名空間: std

請參閱

參考

char_traits 結構