//插入val到pos的后面,然后返回一个指向这个元素的迭代器 iterator insert( iterator pos, const pair<KEY_TYPE,VALUE_TYPE> &val ); //插入start到end的元素到map中 void insert( input_iterator start, input_iterator end ); //只有在val不存在时插入val。返回值是一个指向被插入元素的迭代器和一个描述是...
You can traverse and print a map as well as an unordered map using iterators in a loop. You can define an iterator as given below. Iterator for map: map iterator 1 2 3 map<type, type>::iterator name; Iterator for unordered map: unordered map iterator 1 2 3 unordered_map<type...
std::vector<int> list; auto r = range<std::vector<int>::iterator>(list.begin(), list.end()); To be generic, we can use decltype to automatically determine the iterator type of a given object: some_type_that_we_dont_know list; auto r = range<decltype(list.begin())>(list.begin...
STL中并没有一个叫做heap的类，而是在<stl_heap.h>中提供了一系列的算法，这些算法包括插入元素时执行的“上溯”和删除元素时执行的“下溯”，堆排序和构建堆，STL中堆的底层是使用vector来管理元素。这些算法都接受两个_RandomAccessIterator。STL中也并没有容器类priority_queue，priority_queue实际上是一个容器...
// map_max_size_etc_sample.cpp // compile with: /EHsc // // Functions: iterator map::max_size(); // void clear() const; // bool empty() const; // iterator erase(iterator first, iterator last); // size_type size() const; // A::reference operator[](const Key& key); /...
map<constchar*,int, ltstr>::iterator prev = cur; map<constchar*,int, ltstr>::iterator next = cur; ++next; --prev; cout <<"Previous (in alphabetical order) is " << (*prev).first << endl; cout <<"Next (in alphabetical order) is " << (*next).first << endl; ...
iterator迭代器。 二、删除map容器中指定的字符串 下面代码中map容器的value对应的是一个string类型的指针,在初始化时类似于string *p = new string("123");。 /** * @FileName map_del_str.cpp * @Describe A simple example for deleting an element of string in map. ...
{cin>> name;// Get keycin>> number;// Get valuephone[name] = number;// Put them in map}cout<<"\nSize of phone map is:"<< phone.size();cout<<"\nList of telephone numbers:\n"; phoneMap::iterator p;for(p = phone.begin(); p!=phone.end(); p++) ...
#include <roaring/roaring.h> #include <stdio.h> #include <stdlib.h> #include <assert.h> bool roaring_iterator_sumall(uint32_t value, void *param) { *(uint32_t *)param += value; return true; // iterate till the end } int main() { // create a new empty bitmap roaring_bitmap...
The single element versions (1) return apair, with its memberpair::firstset to an iterator pointing to either the newly inserted element or to the element with an equivalent key in themap. Thepair::secondelement in thepairis set totrueif a new element was inserted orfalseif an equivalent...