游戏代码：

#include<bits/stdc++.h>
#include<windows.h>
using namespace std;
using ull=unsigned long long;
void pc(ull n,ull j,ull k){
	if(k-j<100){
		if(n<=5){
			cout<<endl<<endl<<endl<<"你这次运气真好！";
			return ;
		}
		if(n<=10){
			cout<<endl<<"你这次运气一般般，加油！";
			return ;
		}
		if(n>10){
			cout<<endl<<"你这次运气不好呀，再接再厉！";
			return ;
		}
	}
	if(k-j>=100){
		if(n<=10){
			cout<<endl<<"你这次运气真好！";
			return ;
		}
		if(n<=20){
			cout<<endl<<"你这次运气一般般，加油！";
			return ;
		}
		if(n>20){
			cout<<endl<<"你这次运气不好呀，再接再厉！";
			return ;
		}
	}
}
int main(){
	Sleep(500);
	cout<<"欢";
	Sleep(200);
	cout<<"迎";
	Sleep(200);
	cout<<"来";
	Sleep(200);
	cout<<"到";
	Sleep(200);
	cout<<"猜";
	Sleep(200);
	cout<<"数";
	Sleep(200);
	cout<<"字";
	Sleep(200);
	cout<<"游";
	Sleep(200);
	cout<<"戏";
	Sleep(200);
	cout<<"！";
	Sleep(200);
	cout<<endl<<endl;
	Sleep(1000);
	srand(time(0));
	ull n,sum=1,k,m,j;
	int op; 
	cout<<"请选择范围(输入0:自动确定(由代码生成),输入1:自主选择(由你输入)):";
	cin>>op;
	if(op==0){
		j=rand()%101;
		k=rand()%201+j+20;
	}
	else{
		Sleep(400);
		cout<<"请输入下限（下限不应为负数）:";
		cin>>j;
		Sleep(400);
		cout<<"请输入上限（上限应该比下限至少大20）:";
		cin>>k;
	}
	Sleep(700);
	cout<<endl<<"答案范围："<<j<<"~"<<k<<"。";
	Sleep(700);
	cout<<endl<<endl<<endl<<"请输入数字: ";
	int s=rand()%(k-j+1)+j;
	while(1){
		cin>>n;
		if(n<s){
			Sleep(400);
			cout<<endl<<endl<<"往大了猜！";
			Sleep(400);
			cout<<endl<<endl<<endl<<"请输入数字: ";
			sum++;
		}
		else if(n>s){
			Sleep(400);
			cout<<endl<<endl<<"往小了猜！";
			Sleep(400);
			cout<<endl<<endl<<endl<<"请输入数字: ";
			sum++;
		}
		else{
			Sleep(400);
			cout<<endl<<endl<<"猜对了！你猜了"<<sum<<"次。";
			Sleep(1000);
			pc(sum,j,k);
			Sleep(1000);
			cout<<endl<<endl<<"还要玩吗？要玩输入1，不要玩输入0: ";
			cin>>m;
			if(m==0){
				cout<<"\n欢迎下次再来！";
				Sleep(1000);
				cout<<endl<<endl<<endl<<endl<<endl<<"即将退出游戏";
				Sleep(600);
				cout<<"…";
				Sleep(600);
				cout<<"…";
				Sleep(1700);
				return 0;
			}
			else{
				Sleep(1000);
				cout<<"请选择范围(0:自动确定(由机器生成),1:自主选择(由你输入)):";
				cin>>op;
				if(op==0){
					j=rand()%101;
					k=rand()%201+j+20;
				}
				else{
					Sleep(400);
					cout<<"请输入下限（下限不应为负数）:";
					cin>>j;
					Sleep(400);
					cout<<"请输入上限（上限应该比下限至少大20）:";
					cin>>k;
				}
				Sleep(700);
				sum=1;
				cout<<endl<<"答案范围："<<j<<"~"<<k<<"。";
				Sleep(700);
				cout<<endl<<endl<<endl<<"请输入数字: ";
				s=rand()%(k-j+1)+j;
			}
		}
	}
}