Удалить из массива четные или нечетные значения

#include <iostream>
using namespace std;
 
void randArr(int* arr, const size_t& length, int min = 1, int max = 5)
{
for (size_t i = 0; i < length; i++)
{
arr[i] = min + rand() % (max - min + 1);
}
}
void printArr(int* arr, const size_t& length, string text = "")
{
cout << "\n\t" << text << " :: ";
for (size_t i = 0; i < length; i++)
{
cout << arr[i] << " ";
}
cout << endl;
}
void pushBack(int*& arr, int& length, int value)
{
int *tmp = new int[length + 1];
for (size_t i = 0; i < length; i++)
{
tmp[i] = arr[i];
}
tmp[length++] = value;
if (arr != nullptr) delete[] arr;
arr = tmp;
}
int* newArray(int* A, int* B, const size_t& length_a, const size_t& length_b, int& size)
{
size = 0;
int* tmp = nullptr;
for (size_t i = 0; i < length_a; i++)
{
for (size_t j = 0; j < length_b; j++)
{
if (A[i] == B[j])
{
bool flag = true;
for (size_t q = 0; q < size; q++)
{
if (tmp[q] == A[i]) {
flag = false;
break;
}
}
 
if(flag) pushBack(tmp, size, A[i]);
break;
}
}
}
return tmp;
}
int main()
{
int size_a, size_b, size_c;
cout << "Enter size two arrays :: ";
cin >> size_a >> size_b;
 
int* A = new int[size_a];
int* B = new int[size_b];
 
randArr(A, size_a);
randArr(B, size_b);
printArr(A, size_a, "Array A ");
printArr(B, size_b, "Array B ");
 
 
int* C = newArray(A, B, size_a, size_b, size_c);
printArr(C, size_c, "Array C ");
 
delete[] C;
delete[] A;
delete[] B;
}