luosimuer

Reference: Removes an element or a range of elements in a set from specified positions or removes elements that match a specified key. Function: iterator erase(    iterator _Where ); iterato

Reference: Returns the number of elements in the set. Function: size_type size( ) const; Return Value: The current length of the set. Example: Output: The set length is 1. The set len

Reference: Returns an iterator addressing the location of an element in a set that has a key equivalent to a specified key. Function: iterator find(    const Key& _Key ) const; const_iterato

Reference: Returns an iterator addressing the first element in the map. Function: const_iterator begin( ) const; iterator begin( ); Return Value: A bidirectional iterator addressing the firs

Reference: Returns an iterator that addresses the location succeeding the last element in a map. Function: const_iterator end( ) const; iterator end( ); Return Value: A bidirectional iterato

Reference: Erases all the elements of a set. Function:

Reference: Returns the number of elements in a set whose key matches a parameter-specified key. Function: size_type count(    const Key& _Key ) const; Parameter: _Key:The key of the ele

Reference: Returns an iterator that addresses the location succeeding the last element in a set. Function: const_iterator end( ) const; iterator end( ); Return Value: A bidirectional ite

#include output_iterator copy( input_iterator start, input_iterator end, output_iterator dest ); The copy function copies the elements between start and end to dest. In other words, after copy has

class pair可以将两个值视为一个单元，尤其是在map和multimap中使用很多，在这里面就是使用pair来管理key-value的成对元素，此外任何函数需要返回两个值也都需要pair。 关于pair相关的定义和实现在STL源码中的stl_pair.h这个文件中，下面列举一下里面的内容： /* * * Copyright (c) 1994 * Hewlett-Packard Co

Reference: Inserts an element or a range of elements into a set. Function: pair insert(    const value_type& _Val ); iterator insert(    iterator _Where,    const value_type& _Val ); temp

Reference: Tests if a set is empty. Function: bool empty( ) const; Return Value: true if the set is empty; false if the set is nonempty. Example: Output: The set s1 is not empt

Reference: Returns a pair of iterators respectively to the first element in a set with a key that is greater than a specified key and to the first element in the set with a key that is equal to or gr

Reference: Returns an iterator that addresses the first element in the set. Function:

Reference: Erases all the elements of a map. Function: void clear( ); Example: Output: The size of the map is initially 2. The size of the map after clearing is 0.

Reference: Returns the number of elements in a map whose key matches a parameter-specified key. Function: size_type count(    const Key& _Key ) const; Parameter: _Key:The key value of the e

Reference: Tests if a map is empty. Function: bool empty( ) const; Return Value: true if the map is empty; false if the map is nonempty. Example: Output: The map m1 is not empty. The

Reference: Returns a pair of iterators respectively to the first element in a map with a key that is greater than a specified key and to the first element in the map with a key that is equal to or gr

Reference: Removes an element or a range of elements in a map from specified positions or removes elements that match a specified key. Function: iterator erase(    iterator _Where ); iterator

Reference: Returns an iterator addressing the location of an element in a map that has a key equivalent to a specified key. Function: iterator find(    const Key& _Key ); const_iterator find(

Reference: Inserts an element or a range of elements into a map. Function: pair insert(    const value_type& _Val ); iterator insert(    iterator _Where,    const value_type& _Val ); temp

Reference: Returns the number of elements in the map. Function: size_type size( ) const; Return Value: The current length of the map. Example: Output: The map length is 1. The map len

构造函数例子#include <iostream> #include <string> using namespace std; int main() { string str("12345678"); char ch[] = "abcdefgh"; string a; //定义一个空字符串 string str_1(str); //全部复制 string st...