符号说明： V：数字和位置都正确

O：数字正确但位置错误

X：数字错误

游戏开始前请输入游戏轮数

#include <bits/stdc++.h>
#include <set>
using namespace std;
int main()
{
	int round;
	cout << "Please Type In The Numbers Of Rounds.";
	cin >> round ;
	cout << "Start."<<"\n";
	int code[4];
	
    int arr[4];
    set<int> used;
    
    
    srand(time(0));
    
    int count = 0;
    while (count < 4) {
        int num = rand() % 10;  
        
        
        if (used.find(num) == used.end()) {
            arr[count] = num;
            used.insert(num);
            count++;
        }
    }
    for (int i=0;i<4;i++)
    {
    	code[i]=arr[i];
	}
	bool success=0;
	
	for(int rd=0;rd<round;rd++)
	{
		int incode[4];
		for (int i=0;i<4;i++)
		{
			cin>> incode[i];
			
		}
		
		int rightnum=0;
		for (int i=0;i<4;i++)
		{
			bool IsExist=0;
			
			for(int j=0;j<4;j++)
			{
				
				if(incode[i]==code[j])
				{
					if(i==j)
					{
						cout << "V ";
						IsExist=1;
						rightnum++;
						break;
					}
					else 
					{
						cout << "O ";
						IsExist=1;
						rightnum=0;
						break;
					}
					
				}
			
				
			}
			if(IsExist==0)
			{
					cout << "X ";
					rightnum=0;
			}
			
		}
		if (rightnum==4)
		{
			success=1;
			cout <<"\n"<< "Success.";
			break;
		}
		
	}
	if (success==0)
	{
		cout<<"\n" << "Failure.";
	}
	
	return 0;
	}