#include "iostream" 
#include   <time.h>  
using namespace std;

void main()
{
     srand( (unsigned)time( NULL ) );
     int number = rand() % 100; 
     int count=0;      
     bool ok=true;
     int small=0;
     int large=100;

     cout<<"猜数字：请输入一个1-100之间的数字"<<endl;
     while(ok)
     {
        int input=0;        
        cin>>input;
        
        if(input<small||input>large)
        {
            cout<<"输入的数字，超出了提示的范围,请重新输入"<<endl;             
        }
        else
        {
            if(input==number)
            {
                cout<<"恭喜你，用了"<<count+1<<"次机会，猜对了"<<endl; 
                ok=false;
                break;
            }
            else
            {        
                if(input<number)
                {
                    count++;
                    cout<<"您用了"<<count<<"次机会"<<endl;
                    cout<<"缩小范围:"<<input<<"到"<<large<<"之间,继续猜吧"<<endl;
                    small=input;

                }
                if(number<input)
                {
                    count++;
                    cout<<"您用了"<<count<<"次机会"<<endl;
                    cout<<"缩小范围:"<<""<<small<<"到"<<input<<"之间,继续猜吧"<<endl;
                    large=input;
                }             
            }
        }
     }
}