C++程序练习小游戏1：系统给出一个随机数，用户来猜大小，猜一次系统给出提示是猜大了还是猜小了，知道猜中那个数为止

#include <iostream>
#include<stdlib.h>
#include <string>
//调试f10执行下一步，f11执行下一句
using namespace std;int main ()
{cout << "game start:" << endl;cout << "please input a number between 0-100: " << endl;int play_again = 1;int true_num= 0, guess_num = 0;int flag = 1;string user_choise;string y = "y";string Y = "Y";string n = "n";string N = "N";while(1){if (play_again == 1 && (true_num == guess_num) )//再玩一次程序{true_num = rand()%(101);	//产生一个随机数cout << "please input your guessing number: " << endl;cin >> guess_num;	//用户猜测}if ((guess_num != true_num)&& (flag !=1))//多次猜测{cin >> guess_num;}if(guess_num != true_num)//猜错了{if (guess_num > true_num ){cout << "the true num is smaller " <<endl;flag ++;}if (guess_num < true_num){cout << "the true num is bigger " <<endl;flag ++;}}if (guess_num == true_num)//猜对了{cout << "Guess right !" <<"Do u want to play again? please input 'Y' or 'N'  " << endl;cin >> user_choise; if ((user_choise == y) || (user_choise == Y) ){play_again = 1;flag = 1;}if ((user_choise == n) || (user_choise == N) ){play_again = 0;flag = 1;break;}}}system("pause");return 0;
}