#include <QMap>
#include <QDebug>

int main() {
    QMap<int, QString> map;
    
    // 插入鍵值對
    map.insert(1, "Apple");
    map.insert(2, "Banana");
    map.insert(3, "Orange");
    
    // 通過鍵查找值
    qDebug() << map.value(2);
    
    // 遍歷所有鍵值對
    for(auto it = map.begin(); it != map.end(); ++it) {
        qDebug() << "Key:" << it.key() << "Value:" << it.value();
    }
    
    return 0;
}

#include <QHash>
#include <QDebug>

int main() {
QHash<QString, int> hash;

// 插入鍵值對
hash.insert("Apple", 10);
hash.insert("Banana", 20);
hash.insert("Orange", 30);

// 通過鍵查找值
qDebug() << hash.value("Banana");

// 遍歷所有鍵值對
QHash<QString, int>::iterator it;
for(it = hash.begin(); it != hash.end(); ++it) {
    qDebug() << "Key:" << it.key() << "Value:" << it.value();
}

return 0;
}

#include <QMultiMap>
#include <QString>
#include <QDebug>

int main()
{
    QMultiMap<int, QString> multimap;

    // 插入鍵值對
    multimap.insert(1, "apple");
    multimap.insert(2, "banana");
    multimap.insert(1, "orange");
    multimap.insert(3, "grape");

    // 使用迭代器遍歷multimap
    qDebug() << "Multimap elements:";
    for (auto it = multimap.begin(); it != multimap.end(); ++it) {
        qDebug() << it.key() << "->" << it.value();
    }

    // 使用equal_range函數(shù)查找與鍵關(guān)聯(lián)的元素范圍
    auto range = multimap.equal_range(1);
    qDebug() << "Elements with key 1:";
    for (auto it = range.first; it != range.second; ++it) {
        qDebug() << it.key() << "->" << it.value();
    }

    return 0;
}

Multimap elements:
1 -> "apple1 -> "orange"
2 -> "banana"
3 -> "grape"
Elements with key 1:
1 -> "apple"
1 -> "orange"

#include <QMultiHash>
#include <QDebug>

int main() {
    QMultiHash<int, QString> multiHash;
    
    // 向多重哈希表插入鍵-值對
    multiHash.insert(1, "Apple");
    multiHash.insert(2, "Banana");
    multiHash.insert(1, "Orange");
    multiHash.insert(3, "Grape");
    
    // 遍歷所有鍵值對
    for(auto it = multiHash.begin(); it != multiHash.end(); ++it) {
        qDebug() << "Key:" << it.key() << "Value:" << it.value();
    }
    
    // 查找特定鍵的值
    int key = 1;
    QList<QString> values = multiHash.values(key);
    qDebug() << "Values for key" << key << ":" << values;
    
    return 0;
}