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  1. #include <iostream>
  2. #include <map>
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7.   map <string,int> myMap = {{ "Beta", 2 }, ///явная инициализация map
  8.                             { "Alpha", 1 },
  9.                             { "Gamma", 3 }};
  10.  
  11.   ///присвоение элементам map новых значений
  12.    myMap.at("Beta") = 0;
  13.    myMap.at("Alpha") = 233;
  14.    myMap.at("Gamma") = -45;
  15.  
  16.   cout << "myMap contains:\n";
  17.   for(auto it = myMap.begin(); it != myMap.end(); ++it)
  18.   {
  19.       cout << it->first << " : " << it->second << endl;///вывод на экран
  20.   }
  21.  
  22.   multimap <char,int> myMultimap;///объявили multimap
  23.  
  24.    ///заполняем myMultimap
  25.    myMultimap.insert ( pair<char,int>('q',111) );
  26.    myMultimap.insert ( pair<char,int>('u',201) );
  27.    myMultimap.insert ( pair<char,int>('h',301) );
  28.  
  29.    cout << "\nmyMultimap contains:\n";
  30.    for (auto it = myMultimap.begin(); it != myMultimap.end(); ++it)
  31.    {
  32.       cout << it->first << " : " << it->second << endl;
  33.    }
  34.  
  35.    myMap.clear();
  36.    myMultimap.clear();
  37.  
  38.    ///новая инициализация myMap
  39.    myMap = {{ "Mike", 40 },
  40.             { "Walle", 999 },
  41.             { "Cloude", 17 }};
  42.  
  43.    ///новая инициализация myMultimap
  44.    myMultimap.insert ( pair<char,int>('q',222) );
  45.    myMultimap.insert ( pair<char,int>('u',223) );
  46.    myMultimap.insert ( pair<char,int>('h',221) );
  47.  
  48.    auto itMap = myMap.begin();///создаем итератор на начало myМap
  49.    auto itMultimap = myMultimap.begin();///создаем итератор на начало myMultimap
  50.    cout << "\nmyMap after clear contains: \t myMultimap after clear contains:\n";
  51.  
  52.    ///вывод на экран myMap и myMultimap
  53.    for(itMap = myMap.begin(),itMultimap = myMultimap.begin(); itMultimap != myMultimap.end(); itMap++,itMultimap++)
  54.    {
  55.        cout << "\t" <<itMap->first << " : " << itMap->second << "\t\t\t\t" << itMultimap->first << " : " << itMultimap->second << endl;
  56.    }
  57.    return 0;
  58. }
Success #stdin #stdout 0s 4368KB
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Standard input is empty
stdout
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myMap contains:
Alpha : 233
Beta : 0
Gamma : -45

myMultimap contains:
h : 301
q : 111
u : 201

myMap after clear contains: 	 myMultimap after clear contains:
	Cloude : 17				h : 221
	Mike : 40				q : 222
	Walle : 999				u : 223
https://ideone.com/Qj1hTg
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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