C++Primer学習ノート——関連容器初識

関連コンテナ内の要素はキーワードに従ってアクセスおよび保存されます.
map key-valueペア(辞書の単語はkey、単語の意味はvalue)--関連配列、setはキーワードmultimap multisetのみを保存し、複数の要素が同じキーワードを持つことを許可する
map

map

    map<string, size_t> words;
    string word;
    while (cin >> word)
    {
        ++words[word];//word       
    }
    for (auto &s : words)
    {
        cout << s.first << "occurs" << s.second << endl;
        //first     ，second   。 pair      
    }

set

set

    map<string, size_t> words;
    set<string> exclude = { "i", "a", "is" };
    string word;
    while (cin >> word)
    {
        if (exclude.find(word) == exclude.end())
        //find()              ，            
            ++words[word];
    }
    for (auto &s : words)
    {
        cout << s.first << "occurs" << s.second << endl;
    }

//11.4
#include
#include
#include
#include
using namespace std;
int main()
{
    map<string, size_t> words;
    set<string> exclude = { "i", "a", "is" };
    string word;
    int index = 0;
    while (cin >> word)
    {
        for (auto &s : word)
        {
            s=tolower(s);
            if (ispunct(s))
            {
                s = '\0';//      、、、？？？？？？
            }
        }

        if (exclude.find(word) == exclude.end())
            ++words[word];
    }
    for (auto &s : words)
    {
        cout << s.first << "occurs" << s.second << endl;
    }
    return 0;
}

関連コンテナの定義

map<string, size_t> words;
map<string,string> name={{"af","advs",
                         {"dsvsfda","fsa"}}；
                         //{key,value}      
set<string> exclude = { "i", "a", "is" };

//11.7
#include
#include
#include
#include
using namespace std;
int main()
{
    map<string, vector<string>> familys = {
        { "shen", {"hongwei","faf"} }
    };
    string xingshi;
    string name1, name2;
    while (cin >> xingshi)
    {
        cin >> name1;
        cin >> name2;
        familys[xingshi].push_back(name1);
        familys[xingshi].push_back(name2);
    }
    for (auto &s : familys)
    {
        vector<string> name;
        name = s.second;
        for (auto &c : name)
            cout << s.first << " " << c << " " << endl;
    }
    return 0;

}