Перевести дату из сокращенного числового формата в полный

switch()
{
    case ...
    ...
}

#include <bits/stdc++.h>
 
using namespace std;
 
int main()
{
    int D, M, Y;
    cin >> D >> M >> Y;
    switch (M)
    {
        case 1: cout << D << " January " << Y << "\n"; break;
        case 2: cout << D << " February " << Y << "\n"; break;
        case 3: cout << D << " March " << Y << "\n"; break;
        case 4: cout << D << " April " << Y << "\n"; break;
        case 5: cout << D << " May " << Y << "\n"; break;
        case 6: cout << D << " June " << Y << "\n"; break;
        case 7: cout << D << " July " << Y << "\n"; break;
        case 8: cout << D << " August " << Y << "\n"; break;
        case 9: cout << D << " September " << Y << "\n"; break;
        case 10: cout << D << " October " << Y << "\n"; break;
        case 11: cout << D << " Novermber " << Y << "\n"; break;
        case 12: cout << D << " December " << Y << "\n"; break;
        default: cout << "Such a month doesn't exist!" << "\n"; break;
    }
    system("pause");
    return 0;
}