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basic_string::erase

從移除指定位置處的一或多個項目範圍進行解碼的字串。

iterator erase(
    iterator _First, 
    iterator _Last
);
iterator erase(
    iterator _It
);
basic_string<CharType, Traits, Allocator>& erase(
    size_type _Pos = 0,
    size_type _Count = npos
);

參數

  • _First
    處理第一個項目的Iterator的位置在即將擦掉的範圍。

  • _Last
    解決的Iterator超過最後一個項目的位置是在即將擦掉的範圍。

  • _It
    處理項目的Iterator的位置在即將擦掉的字串。

  • _Pos
    第一個字元的索引中移除的字串。

  • _Count
    要移除的項目數目,如果有許多在字串的範圍內 _Pos開始

傳回值

在前兩個成員函式, Iterator處理第一個字元在成員函式來移除的最後一個字元之後。 針對第三+成成員函式,項目會清除之字串物件的參考。

備註

第三+成成員函式傳回 *this

範例

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

int main( ) 
{
   using namespace std;

   // The 1st member function using a range demarcated
   // by iterators
   string str1 ( "Hello world" );
   basic_string <char>::iterator str1_Iter;
   cout << "The original string object str1 is: " 
        << str1 << "." << endl;
   str1_Iter = str1.erase ( str1.begin ( ) + 3 , str1.end ( ) - 1 );
   cout << "The first element after those removed is: "
        << *str1_Iter << "." << endl;
   cout << "The modified string object str1 is: " << str1 
           << "." << endl << endl;

   // The 2nd member function erasing a char pointed to 
   // by an iterator
   string str2 ( "Hello World" );
   basic_string <char>::iterator str2_Iter;
   cout << "The original string object str2 is: " << str2
        << "." << endl;
   str2_Iter = str2.erase ( str2.begin ( ) + 5 );
   cout << "The first element after those removed is: "
        << *str2_Iter << "." << endl;
   cout << "The modified string object str2 is: " << str2 
        << "." << endl << endl;

   // The 3rd member function erasing a number of chars 
   // after a char
   string str3 ( "Hello computer" ), str3m;
   basic_string <char>::iterator str3_Iter;
   cout << "The original string object str3 is: " 
        << str3 << "." << endl;
   str3m = str3.erase ( 6 , 8 );
   cout << "The modified string object str3m is: " 
        << str3m << "." << endl;
}
  
  
  
  
  
  
  
  

需求

標題: <string>

命名空間: std

請參閱

參考

basic_string Class