I found difficulty in friend class for High Card Game program

[prognoob]

I need to write a C++ program to perform a high card game
However, when I write for friend class, VS2017 display many errors in my friend function.
I have no idea how to rewrite it :(
It would be better if there are no many modification on the structure of code.

There are some objective for the program:
When the game starts, I will have $10 dollars.
In each round, the program deals one hand to me by drawing a card from the tip of the deck and shows it to me.
Enter 'b' if next card is bigger then current card and vice versa when I enter 's'
The game will end if
1. I type 'n' for next round (but three round must be played before quit game) or
2. Balance = 0 or
3. All cards in deck are drawn

#include <iostream>
#include <cstdlib>
#include <cstring>
#include <ctime>

using namespace std;

class Card {
private:
    char *face;
    char *suit;
    int value;    // value depends just on the face

public:
    Card();

    void setFace(char *f);

    char *getFace();

    void setSuit(char *s);

    char *getSuit();

    void setValue(int i);

    int getValue();

    // implement this friend function for comparing cards
    friend int compare(Card, Card);


};

// default constructor
// pointers should be initialized to NULL, numbers to zero
Card::Card() {
    // your code here.
	face = NULL;
	suit = NULL;
	value = 0;

}

void Card::setFace(char *f) {
	face = f;
    // your code here.
}

char *Card::getFace() {
	return face;
    // your code here. 
}

// your code here. 
// Finish the other access functions.
void Card::setSuit(char *s) {
	suit = s;
	// your code here.
}

char *Card::getSuit() {
	return suit;
	// your code here. 
}

void Card::setValue(int val) {
	value = val;
	// your code here.
}

int Card::getValue() {
	return value;
	// your code here. 
}


// our friend function
int compare(Card cur, Card prev) {
    // first compare face, i.e. value, if face is equal, compare suit
    // suit is ranked alphabetically in ascending order, so clubs < diamonds < hearts < spades
    // this is also the rule of Bridge
    // return 1 if cur is bigger than prev, and -1 otherwise
	if (cur.getValue == prev.getValue) {
		if (cur.getSuit == "Spades") {
			return 1;
		}
		else if (cur.getSuit() == "Hearts" && prev.getSuit() != "Spades") {
			return 1;
		}
		else if (cur.getSuit() == "Diamonds" && prev.getSuit() != "Clubs") {
			return 1;
		}
		else {
			return -1;
		}
	}
	else {
		if (cur.getValue > prev.getValue)
			return 1;
		else
			return -1;
	}


}


void filldeck(Card *, char [][10], char [][10]);

void shuffle(Card *);

int deal(Card *, int);

const int decksize = 52;


// fill the deck with 52 cards sequentially with the original order in wFace and wSuit
// that is, the 13 cards should be Ace of Hearts, Deuce of Hearts, ..., King of Hearts
// the next 13 cards are Ace of Diamonds, ..., King of Diamonds, and so on
// you also need to set the value for each Card according to its face: Ace has a value of 1,
// Deuce 2, Three 3, ..., Jack 11, Queen 12, King 13
void filldeck(Card *wDeck, char wFace[][10], char wSuit[][10]) {
    for (int i = 0; i < decksize; i++) {
        // your code here. 
		for (int i = 0; i < decksize; i++) {
			wDeck[i].setFace(wFace[i % 13]);
			wDeck[i].setSuit(wSuit[i % 4]);
			wDeck[i].setValue((i % 13) + 1);
		}
    }
}

// for each card of the deck, randomly shuffle it with another in the deck
void shuffle(Card *wDeck) {
    for (int i = 0; i < decksize; i++) {
        int j = rand() % decksize;
        // swap cards i and j
        // your code here.
		Card tmp;
		tmp = wDeck[i];
		wDeck[i] = wDeck[j];
		wDeck[j] = tmp;
    }
}

// deals one card of the i-th hand from wDeck, and check if it's bigger/smaller than
// the previous hand
int deal(Card *wDeck, int i) {
    cout << "Hand " << i << ": ";
    cout << wDeck[i - 1].getFace() << " of " << wDeck[i - 1].getSuit() << ". ";

    int result = 0;
    if (i > 1) {
        result = compare(wDeck[i - 1], wDeck[i - 2]);
    } else
        cout << endl;
    return result;
}


int main() {
    Card deck[decksize];

    char face[][10] =
            {"Ace", "Deuce", "Three", "Four", "Five",
             "Six", "Seven", "Eight", "Nine", "Ten",
             "Jack", "Queen", "King"};

    char suit[][10] =
            {"Hearts", "Diamonds", "Clubs", "Spades"};

    int seed;
    cout << "Enter the seed for random number generation: ";
    cin >> seed;
    srand(seed);    // this sets the seed of random number generation

    filldeck(deck, face, suit);
    shuffle(deck);

    // game begins
    int hand = 1, balance = 10;
    char next = 'y';

    cout << "### High Card Game Begins! ###\n";
    for (; (next != 'n') && (hand <= decksize); hand++) {
        // your code here. 
		if (balance > 0) {
			cout << "Hand 1:" << deck[0].getFace() << " of " << deck[0].getSuit() << endl;
			cout << "Your balance is " << balance << " dollars. ";
			cout << "Your bet?";
			cin >> next;
		}
		else if (balance == 0) {			
			break;
		}


		if (next == 'b' || next == 's') {
			deal(deck, hand);
			if (next == 'b') {
				if (deal(deck, hand) == 1) {
					cout << "BIGGER than the previous hand.WIN! ";
					cout << "Your balance is " << balance + 10 << " dollars.";
					cin >> next;
				}
				else if (deal(deck, hand) == -1) {
					cout << "SMALLER than the previous hand.LOSE! ";
					cout << "Your balance is " << balance - 10 << " dollars.";
					cout << "Your bet?";
					cin >> next;
				}
			}
			else {
				if (deal(deck, hand) == 1) {
					cout << "BIGGER than the previous hand.LOSE! ";
					cout << "Your balance is " << balance - 10 << " dollars.";
					cin >> next;
				}
				else if (deal(deck, hand) == -1) {
					cout << "SMALLER than the previous hand.WIN! ";
					cout << "Your balance is " << balance + 10 << " dollars.";
					cout << "Your bet?";
					cin >> next;
				}
			}
		}

		if (next == 'n') {
			if (hand < 4) {
				cout << "You can't quit now! You bet?";
				cin >> next;
			}
			else
				break;
		}

    }

    if (balance > 0)
        cout << "Game ends, you have " << balance << " dollars. Congratulations!\n";
    else
        cout << "\nGame ends, you are broke! :(\n";


    return 0;
}

[Thomas1965]

First problem I can see is on line 85 - compare with line 88 where you call the function correctly.
Second problem is also on line 85 - operator == doesn't work for char*, Google will tell you how to compare char*.

There are more issues, fix them step by step.