Accessing variables from one class file in another one - c++

Question

I have the following files:
main.cpp
shop.hpp
player.hpp
With the following code in each of them:
main.ccp:
#include <iostream>
#include <cstdlib>
#include "shop.hpp"
using namespace std;
string *inventory= new string[3];
int invGold= 355;
int main(void){
shop store;
store.store();
}
shop.hpp:
#include <iostream>
#include <cstdlib>
using namespace std;
class shop{
public:
string shopOption;
string shopOptions[6]= {"Buy", "buy", "Sell", "sell", "Leave", "leave"};
string shopInv[3]= {"Sword", "Potion", "Arrows x 25"};
int shopInvAmount= sizeof(shopInv)/sizeof(shopInv[0]);
int shopPrices[3]= {250, 55, 70};
shop(){
cout << "Shopkeeper: We buy, we sell, what's your buisness?" << endl;
}
void store(void){
getline(cin,shopOption);
if(shopOption.compare(shopOptions[0]) == 0 || shopOption.compare(shopOptions[1]) == 0){
buy();
}
else if(shopOption.compare(shopOptions[2]) == 0 || shopOption.compare(shopOptions[3]) == 0){
sell();
}
else if(shopOption.compare(shopOptions[4]) == 0 || shopOption.compare(shopOptions[5]) == 0){
leave();
}
}
void buy(){
srand(time(0));
string buyQuotes[3]= {"What are you buyin', hon?", "Make it quick, I ain't got all day.", "Another day, another sell."};
int quotePick= rand() % sizeof(buyQuotes)/sizeof(buyQuotes[0]) - 1;
if (quotePick < 0){
quotePick= 0;
}
else if (quotePick > (sizeof(buyQuotes)/sizeof(buyQuotes))){
quotePick= sizeof(buyQuotes)/sizeof(buyQuotes);
}
cout << "TEST:" << sizeof(shopInv)/sizeof(shopInv[0]) << endl;
cout << buyQuotes[quotePick] << endl;
cout << "SHOP INVENTORY" << endl << "--------------" << endl;
cout << endl;
for (int i=0; i < sizeof(shopInv)/sizeof(shopInv[0]); i++){
cout << shopInv[i]<< ": " << shopPrices[i] << endl;
}
cout << endl << "What'll it be?:";
getline(cin,shopOption);
}
void sell(){
}
void leave(){
}
};
and player.hpp
class player{
public:
int playerHP= 18;
string playerInv[5] {};
int playerGold= 355;
};
Now, what i'd like to do, is that after the character selects the items they want to buy, and te amount of it, (Not programmed yet) check the price of the combined items, and see if the character has enough money on hand, and if the character buys the items, add them to the player's inventory.
But i'd like to keep the values the store uses, and everything related to the player in different class files.
Thing is, I have no idea how to pull something like that.
So, is t possible to access a class' variable from another class that is in another file althogether?
And if isn't, how would you suggest i get around this problem?

Answer 1

Start reading here: How does the compilation/linking process work? to get multiple files working for you. Odds are pretty good that whatever coding environment you are using will automate the process for you.
Then consider making an item class
class Item
{
public:
Item(string name, int price): mName(name), mPrice(price)
{
}
string getName()
{
return mName;
}
string getPrice()
{
return mPrice;
}
// other functions
private:
string mName;
int mPrice;
// other stuff
}
In Shop and Player, keep a list of Items
vector<Item> items;
When a Player tries to buy an item, find it in the list, ensure the Player can afford it, remove it from the Shop's list and add it to the Player's list.