What does this code means??

Question

Hello guys i've solved this problem but i still don't understand this line of code in the 14th line.

#include <iostream>
#include <string>
using namespace std;

//change the class to a template
template <class T>
class Queue
{
private:
T *arr;
int count;
public:
Queue(int size) {
arr = new T[size]; //what does it means??
count = 0;
}
void add(T elem) {
arr[count] = elem;
count++;
}
void get(int index) {
cout << arr[index]<<endl;
}
};

int main()
{
Queue<string> q(4);
q.add("James");
q.add("Andy");
q.add("Amy");
q.get(2);

Queue <int> n(2);
n.add(42);
n.add(33);
n.get(1);

return 0;
}

Answer 1

Hi Anoir,
I see you have completed C++ lesson, perhaps you need to review the "Templates, Exception and Files" module, class template specifically

https://www.sololearn.com/learn/CPlusPlus/1916/

Answer 2

Anoir B'f

Here we are initialising array of length 'size' where size is given.

Here T is generic type means it can be anything like string or int

You can understand through this example:.

string * arr = new string [size];
int * arr = new int[size];