内存匹配游戏++如何将数组中的字符随机化

您好，我在此作业方面遇到问题。我的程序是C ++中的Memory Match游戏，它可以运行，但是每次用户输入有效或无效的响应后，我都需要获取2D数组中的字符以移动位置。他们停留在与初始化相同的位置。我尝试了多种想法，但没有得出任何结论。甚至可能会有所帮助的一些提示也将受到赞赏。

#include<iostream>
#include<cstdlib>
#include<ctime>
#include<string>
using namespace std;

class Game //Memory Match Game
{
private:
     char cards[4][4] = {   { '@', '#', '$', '%' },
                        {'^', '&', '*', '+'},
                        {'@', '#', '$', '%'},
                        {'^', '&', '*', '+' } };

char deck[16] = { '@','#', '$', '%', '^','&', '*', '+' }; //not being used atm
int r1, r2, c1, c2;
public:
    Game()
    {
        r1 = 0; r2 = 0; c1 = 0; c2 = 0;
    }

void begin()
{
    srand((unsigned)time(NULL));
    for (int x = 0; x < 4; x++) //begin designating cards 
    {
        for (int y = 0; y < 4; y++)
        {
            cards[rand() % x][rand() % y]; // <:::::[:::] FIX
            cout << " " << cards[x][y] << " ";
        }
        cout << endl;
    }
    cout << " \n    1 2 3 4\t\n";
    cout << "   ";
    for (int x = 0; x <= 8; x++)
    {
        cout << "_";
    }
    cout << endl;

    for (int x = 0; x < 4; x++) //appropriate positioning
    {
        cout << x + 1 << " | ";
        for (int y = 0; y < 4; y++)
        {
            cout << "? ";
        }
        cout << endl;
    }
    cout << endl;
    input();
}

void input()
{
    srand(time(0));
    cout << "Please type in the row and column of choice.\n"; //begin user play
    cin >> r1;
    cin >> c1;
    cout << "Please type in the row and column of choice\n";
    cin >> r2;
    cin >> c2;

    r1--; r2--; c1--; c2--;
    cout << "     1 2 3 4\n";
    cout << "   ";
    for (int x = 0; x <= 8; x++)
    {
        cout << "_";  
    }
    cout << endl;
    for (int x = 0; x < 4; x++)
    {
        cout << x + 1 << " | ";
        for (int y = 0; y < 4; y++)
        {
            if ((x == r1) && (y == c1))
            {
                cout << cards[x][y] << " ";
            }
            else if ((x == r2) && (y == c2))
            {
                cout << cards[x][y] << " ";
            }
            else cout << "? ";
        }
        cout << endl;
    }
    match();

}
  void match()
  {
      if (cards[r1][c1] == cards[r2][c2])
    {
        cout << "Valid Match!\n";
        input();
    }
     else
        cout << "Invalid Match!\n";
        input();

}

};

 int main()
{
     Game memoryMatch;
    memoryMatch.begin();

    system("pause");
 }