不会赢的游戏1

游戏规则：输入整数范围，根据系统给出提示进行猜数，每猜一次减少一次机会，猜中或者机会耗尽则一轮游戏结束。

游戏示例：输入范围0-4，你可以猜数1,2,3，系统提示有一次猜数机会

    如果你猜1，如果猜中，系统显示“恭喜你，猜对了”，否则将显示“猜错了，正确结果为XXX”。

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <time.h>

int main(void){
	int guess_cishu=0;
	int guess_cishu1=0; int guess_cishu2=0;
	int up_limit=0;
	int down_limit=100;
	int caishu=1;
	int result;
	char cmd[10];
	double random_number;

	while(1){
		srand((unsigned)time(NULL)*100);
		printf("输入start开始游戏，输入end结束游戏\n");
		scanf("%s", cmd);  //用fgets会出问题，why
		if(memcmp(cmd, "end", 3)==0) break;
		else if(memcmp(cmd, "start", 5)==0){
			memset(cmd, 0, 10);
			random_number = (double)rand()/RAND_MAX;

			printf("请输入猜数范围\n");
			printf("范围上限:");
			scanf("%d", &up_limit);
			printf("范围下限:");
			scanf("%d", &down_limit);
			if(up_limit>=down_limit-2){
				printf("范围不合理，请重新输入\n");
				continue;
			}
			guess_cishu = (int)(log10((double)down_limit-up_limit-1)/log10((double)2));
			printf("你有%d次猜的机会\n", guess_cishu);
			while(1){
				printf("输入要猜的数字:");
				scanf("%d", &caishu);
				if(caishu>=down_limit||caishu<=up_limit){
					printf("输入的数字非范围内\n");
					continue;
				}
				else{
					random_number = (double)rand()/RAND_MAX;
					guess_cishu --;
					guess_cishu1 = (int)(log10((double)caishu-up_limit-1)/log10((double)2));
					guess_cishu2 = (int)(log10((double)down_limit-caishu-1)/log10((double)2));
					if(guess_cishu==guess_cishu1&&guess_cishu==guess_cishu2){
						if(random_number<0.5) up_limit=caishu;
						else down_limit=caishu;
					}
					else if(guess_cishu==guess_cishu1){
						down_limit = caishu;
					}
					else{
						up_limit = caishu;
					}
					/*
					if(caishu>(up_limit+down_limit)/2){
						down_limit = caishu;
					}
					else if(caishu<(up_limit+down_limit)/2){
						up_limit = caishu;
					}
					else{
						if(random_number<0.5) up_limit = caishu;
						else down_limit = caishu;
					}*/					
					if(guess_cishu>0){
						printf("你猜错了，你还可以再猜%d次，范围是%d-%d\n", guess_cishu, up_limit, down_limit);
					}
					else break;
				}
			}
			random_number = (double)rand()/RAND_MAX;
			result = floor(random_number*(down_limit-up_limit-1))+up_limit+1;
			printf("哈哈，猜错了，正确答案是%d\n", result);  //用随机数输出结果
		}
		else{
			printf("未知指令\n");
			memset(cmd, 0, 10);
		}
	}
	printf("用户结束游戏\n");
	system("pause");

	return 0;
}

我们来看结果：