#include <iostream>
 
using namespace std;
 
struct elem {
    int key;
    int number;
};
 
void func(elem** arr, elem* q, int i) {
    arr[i] = q;
}
 
 
int main() {
    int n = 4;
    elem** arr = new elem*[n];
    elem q = { 2,0 }; elem w = { 5,1 }; elem e = { 10,4 }; elem r = { 54,5 };
    func(arr, &q, 0);
    func(arr, &w, 1);
    func(arr, &e, 2);
    func(arr, &r, 3);
    for (int i = 0; i < n; i++)
      cout << i << ": " << arr[i]->key << endl;
    return 0;
}

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