qt容器类的使用

怼烎@ 2023-07-25 08:40 14阅读 0赞

添加头文件

#include<QtDebug>
    #include<QList>
    #include<QVector>
    #include<QHash>
    #include<QStack>
    #include<QQueue>
    #include<QMap>

相应容器类的关键用法代码

//队列
        QQueue<int> myqueue;
        myqueue.enqueue(10);
        myqueue.enqueue(20);
        myqueue.enqueue(60);
        while (!myqueue.isEmpty()) {
            qDebug() << myqueue.dequeue() <<endl;
        }
    
        QQueue<string> queue;
        queue.enqueue("hello");
        queue.enqueue("world");
        queue.enqueue("qt code");
        while (!queue.isEmpty()) {
            qDebug() <<"QQueue: "<< queue.dequeue().data() <<endl;
           // printf("%s \n",queue.dequeue().data());
        }
    
        //栈
        QStack<int> mystack;
        mystack.push(10);
        mystack.push(20);
        mystack.push(30);
        while (!mystack.isEmpty()) {
            qDebug()<<"QStack: "<< mystack.pop() <<endl;
        }
    
        QVector<int> myvector;
        myvector.append(50);
        myvector.append(30);
        myvector.append(20);
        myvector.push_front(100);
        QVector<int>::iterator iter;
        for (iter=myvector.begin();iter != myvector.end();iter++) {
            qDebug() <<"QVector: "<< *iter << endl;
        }
    
        QList<string> mylist;
        mylist.append("hello ");
        mylist.append("world ");
        mylist.push_front("list : ");
        QList<string>::iterator list_iter;
        for (list_iter=mylist.begin();list_iter != mylist.end();list_iter++) {
            qDebug()<<"QList: "<< list_iter->data() <<endl;
        }
        qDebug()<<"test2: " <<endl;
        mylist.insert(2,"2 world");
        mylist.replace(0,"123456");
        for (list_iter=mylist.begin();list_iter != mylist.end();list_iter++) {
            qDebug()<<"QList: "<< list_iter->data() <<endl;
        }
    
    //hash与map类似
    //hash
        QHash<QString ,int> myhash;
        myhash.insert("alen",1);
        myhash["lucy"]=2;
        myhash["peter"]=3;
        QHashIterator<QString ,int> hash_iter(myhash);
        while (hash_iter.hasNext()) {
            hash_iter.next();
            qDebug() << hash_iter.key() << ":" << hash_iter.value();
        }
    
    //map
        QMap<QString, int> map;
        map.insert("key 2", 2);
        map.insert("key 0", 0);
        map.insert("key 1", 1);
        map["key 3"]=3;
    
        // 通过QList获取键值对
        QList<QString> kList = map.keys();
        for(int i=0; i<kList.count(); i++)
        {
           qDebug() << kList[i];
        }
    
        QList<int> vList = map.values();
        for(int i=0; i<vList.count(); i++)
        {
           qDebug() << vList[i];
        }
    
        // 通过QMapIterator获取键值对
            QMapIterator<QString, int> it(map);
            while(it.hasNext())
            {
                it.next();
                qDebug() << it.key() << ":" << it.value();
            }