Please help with C++ function, and include a main method with test cases. Thank you.

#include

using namespace std;

int current_size = 4;

int resize_step = 4;

//This functions add the value x at the last position in the array

//The count of elements is indicated by the variable count

//If the array is already at maximum it resizes

//The array starts at current_size size and resizes in resize_step intervals

void add_number(char* &arr, int count, char x)

{

//Your code starts here

//Your code ends here

}