basic_string::erase

从指定的位置移除元素或元素的大小字符串的。

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

参数

  • _First
    解决的迭代器第一个元素的位置将清除的大小。

  • _Last
    解决的迭代器通过最后一个元素的位置一将清除的大小。

  • _It
    解决的迭代器元素的位置将清除的字符串。

  • _Pos
    第一个字符的索引。要移除的字符串的。

  • _Count
    要移除的元素数,如果有许多在字符串范围内从 _Pos启动

返回值

对于前两个成员函数,迭代器解决第一个字符放到成员函数中移除的最后一个字符之后。 为第三个成员函数,为元素清除的字符串对象的引用。

备注

第三个成员函数返回 *this

示例

// 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;
}
  
  
  
  
  
  
  
  

要求

标头: <string>

命名空间: std

请参见

参考

basic_string Class