Help c++

Question

#include <iostream>
using namespace std;

class Queue {
int size;
int* queue;

public:
Queue() {
size = 0;
queue = new int[100];
}
void add(int data) {
queue[size] = data;
size++;
}
void remove() {
if (size == 0) {
cout << "Queue is empty"<<endl;
return;
}
else {
for (int i = 0; i < size - 1; i++) {
queue[i] = queue[i + 1];
}
size--;
}
}
void print() {
if (size == 0) {
cout << "Queue is empty"<<endl;
return;
}
for (int i = 0; i < size; i++) {
cout<<queue[i]<<" <- ";
}
cout << endl;
}
//your code goes here
Queue operator+(Queue &obj){
int* res = new int[200];
for(int i = 0; i<size; i++){

return res;
}

}
};

int main() {
Queue q1;
q1.add(42); q1.add(2); q1.add(8); q1.add(1);
Queue q2;
q2.add(3); q2.add(66); q2.add(128); q2.add(5);
Queue q3 = q1+q2;
q3.print();

return 0;
}

How can I solve it

Answer 1

Idk c++.
But this seems to work:

Queue operator + (Queue &obj) {
Queue res;
for(int i = 0; i<size; i++) {
res.add(queue[i] + obj.queue[i]);
}
return res;
}