Help me please.

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;
}

Queue operator+(Queue &q){
Queue q3;
q3.queue[size] = this->queue[size] + q.queue[size];
return q3;
}

};

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;
}

Answer 1

Queue operator+(Queue &q){
Queue q3;
for(int i=0;i<q.size;i++){
q3.queue[q3.size] = this->queue[q3.size] + q.queue[q3.size];
q3.size++;
}
return q3;
}

in your code you only added the two queue's value at 4th index. And also when you called print on q3 object , size was having value equal to 0 since you never used it.

Answer 2

Thank you so much. But the expected output is: 42 <-2 <-8 <-1 <-3 <-66 <-128 <-5 <-