How to.merge to.arrays.. what is the error is operator overload ?

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 &obj)
{
Queue res;
int i,j;
res.size = size + obj.size;

for (i = size; i < size; i++)
res.queue[i] = queue[i];
for (j = 0; j < obj.size; j++,i++)
res.queue[i] = obj.queue[j];

return res;
}

};

int main() {
Queue q1;
q1.add(42); q1.add(2);
Queue q2;
q2.add(3); q2.add(56);
Queue q3;
q3 = q1+q2;
q3.print();
}

Answer 1

Please save your program in a C++ code and then link the code here so that it is easier to reference line numbers and compiler errors.

Anyways, in the operator+() function, in the first for loop
for (i = size; i < size; i++)
why are doing `i = size`. The loop body will never be executed as i is never less than size, because you've set it *equal to* `size`

Also, you're asking a question related to C++ and you've put the C# tag in your question. Please use suitable tags in your question. Kimdly change the c# to c++