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void 黑洞数()
{//缘由https://ask.csdn.net/questions/7464673?spm=1005.2025.3001.5141int n, a, b, c, t;cin >> n;while (n != 495){a = n % 10, n /= 10, b = n % 10, c = n / 10;if (a<b)t = a, a = b, b = t;if (a<c)t = a, a = c, c = t;if (b<c)t = b, b = c, c = t;n = (a * 100 + b * 10 + c) - (c * 100 + b * 10 + a);cout << (a * 100 + b * 10 + c) << ends << (c * 100 + b * 10 + a) << ends << n << endl;}
}

	int shu = 3112344, shuan = shu, p = 0, j = 0, cf[44]{0};while (++shuan < INT_MAX){j = p = 0;while ((shuan = 数重组值最大小(shuan)), shuan != 495 && shuan != 6174&& shuan != 74943 && shuan != 63954 && shuan != 59994&& shuan != 851742 && shuan != 631764 && shuan != 549945 && shuan != 7619733&& shuan)if (++p >= 44){cout << shu << ":" << shuan << ends;system("pause");}else{while (cf[j])if (cf[j] == shuan)cout <<"黑洞数："<< shuan << ends, system("pause"); else ++j;cf[j++] = shuan;}while (j-- >= 0)cf[j] = 0;shuan = ++shu;cout << endl;}

int 数重组值最大小(int 整数)
{		/*C++任意输入一个整数，再把它的各位数字重新组合一个新的整数，使其值最大*///缘由https://bbs.bccn.net/viewthread.php?tid=499134&pid=2718301&page=1#pid2718301int 输入整数 = 整数, 数(0), 输出(0), 取值(0), 比较(0), 暂存(0), 位(0), 序(0), 反向(0);bool 控制(true);//if (输入整数 < 100)输入整数 *= 10;//if (输入整数 > 1000)输入整数 /= 10;//scanf_s("%d", &输入整数);do{比较 = 序 = 0;暂存 = 输入整数;do{取值 = 暂存 % 10;if (取值 > 比较)/*每次取最大值*/{比较 = 取值;数 = 序;}++序;} while (暂存 /= 10);if (控制) 位 = 反向 = 序;输出 += 比较 * pow(10, --位);控制 = false;} while (输入整数 -= 比较 * pow(10, 数));/*每次减去最大值*///printf_s("%d ", 输出);数 = 0; 取值 = 输出;do{数 += (输出 % 10) * pow(10, --反向);} while (输出 /= 10);/*反向输出各位数*///printf_s("%d ", 数);cout << 取值 << "-" << 数 << "=" << 取值 - 数 << ends << ends;return 取值 - 数;
}

void 寻找黑洞数()
{int shu = 47, shuan = shu, p = 0, j = 0, cf[44]{0}, 黑洞数[44]{0};while (shu < INT_MAX){while ((shuan = 数重组值最大小(shuan))){p = 0; while (黑洞数[p])if (黑洞数[p] != shuan)++p; else goto 继续;//返回判断j = 0; while (cf[j] && cf[j] != shuan)++j;//过程添加if (cf[j]){p = 0; while (黑洞数[p])++p;黑洞数[p] = shuan;//添加cout << "黑洞数：" << shuan << ends;system("pause");goto 继续;}else cf[j] = shuan;}继续:while (j >= 0)cf[j--] = 0;//清理shuan = ++shu;cout << endl;}p = 0; while (黑洞数[p])cout << "黑洞数：" << 黑洞数[p++] << ends; cout << endl;
}