Saam hash example, C++ (clang)

Saam hash example

#include <iostream>
#include <string>
#include <vector>
#include <queue>
#include <unordered_map>

using namespace std;

class HashTable
{
private:
    unordered_map<int, string> DB;
public:
    void insert(int key, string item);
    string getItem(int key);
    bool inHash(int key);
    void printTable();
};

void HashTable::insert(int key, string item)
{
    auto hashTablePointer = DB.find(key);
    if(hashTablePointer != DB.end())
    {
        cout << "Already in table" << endl;
        return;
    }
    DB[key] = item;
}

string HashTable::getItem(int key)
{
    if(inHash(key))
    {
        return DB[key];
    }
    return "not in table";
}

bool HashTable::inHash(int key)
{
    return (DB.find(key) != DB.end());
}

void HashTable::printTable()
{
    for(auto local_it = DB.begin(); local_it != DB.end(); ++local_it)
    {
        cout << local_it->second << endl;
    }
}

int main()
{
    HashTable myTable;
    cout << "inserting elements" << endl;
    myTable.insert(1, "one");
    myTable.insert(2, "two");
    myTable.insert(3, "three");
    myTable.insert(4, "four");
    cout << "inserted 4 elements" << endl;
    cout << "getting element 1" << endl;
    cout << myTable.getItem(1) << endl;
    cout << "printing table" << endl;
    myTable.printTable();
}


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