// erasing element using value intc=mp.erase('c'); // printing map elements after deletion cout<<"The map elements after 2nd deletion are : "; for(it1=mp.begin();it1!=mp.end();++it1) cout<<it1->first<<"->"<<it1->second<<endl; cout<<"The number of elements deleted in 2...
cout << it1->first << "->" << it1->second << endl; cout << "The number of elements deleted in 2nd deletion are : "; cout << c << endl; cout << endl; // erasing element using value // key not present int d = mp.erase('w'); // printing map elements after deletion ...
从1中,我们可以看到erase的返回值是iterator。An iterator pointing to the element that followed the last element erased by the function call(指向erase元素的后一个元素的迭代器)。 于是我们有了以下清除方法: 1#include"Allinclude.h"23intmain()4{56cout<<endl<<"map:"<<endl;7map<char,int>mymap;8...
The C++ functionstd::map::erase()removes range of element from the the map. This member function reduces size of map. Declaration Following is the declaration for std::map::erase() function form std::map header. C++11 iterator erase (const_iterator first, const_iterator last); ...
Iterator to the inserted element.Below is an example of insertion,Let's insert the below <key, value> pairs,Key Value 5 10 2 8 3 12 2 14 5 6 The above insertion will be like below,1) Declare the multimap multimap <int,int> mymap; 2) Insert the first key mymap.insert(make_pair...
2: B 3: C Example In the following example, we are going to erase the element by using the range of the iterator. Open Compiler #include<iostream>#include<map>intmain(){std::multimap<int,std::string>a={{1,"Hi"},{2,"Hello"},{3,"Namaste"},{3,"Vanakam"}};autox=a.begin();au...
c-container from which to erase pred-predicate that returnstrueif the element should be erased Return value The number of erased elements. Complexity Linear. Example Run this code #include <iostream>#include <unordered_map>voidprintln(autorem,autoconst&container){std::cout<<rem<<'{';for(char...
map<int, int> mp; // insert elements in random order mp.insert({ 2, 30 }); mp.insert({ 1, 40 }); mp.insert({ 3, 60 }); mp.insert({ 5, 50 }); // prints the elements cout << "The map before using erase() is : "; cout << "KEY ELEMENT "; for (auto itr = mp....
instance only. Because in that eraseKey() method, we use unsafe_erase() method to delete element in tbb::concurrent_unordered_map instance. As "unsafe_" prefix says, the unsafe_erase() method can NOT ensure concurrenty safety between different calls to this method, that's why we used a...
(); // erase an element and reinspect cliext::map<wchar_t, int>::iterator it = c1.erase(c1.begin()); System::Console::WriteLine("erase(begin()) = [{0} {1}]", it->first, it->second); // add elements and display " b c d e" c1.insert(cliext::map<wchar_t, int>::...