pat甲级1023

 1 #include <cstring>
 2 #include <iostream>
 3 #include <algorithm>
 4 using namespace std;
 5 int book[10];
 6 char num[22], result[22];
 7 int main()
 8 {
 9     
10     scanf("%s", num);
11     int len = strlen(num);
12     int flag = 0;
13     for (int i = len-1; i >= 0; i--)
14     {
15         int temp =( num[i]-'0') * 2;
16         result[i] = flag + temp % 10+'0';
17         flag = 0;
18         if (temp >=10) flag = 1;
19     }
20     result[len] = '\0';
21     if (flag == 1)
22     {
23         cout << "No" << endl;
24         cout << 1 << result;
25     }
26     else
27     {
28         string temp(result);
29         sort(num, num + len);
30         sort(result, result + len);
31         if (strcmp(result, num) == 0)
32             cout << "Yes" << endl;
33         else cout << "No" << endl;
34         cout << temp.c_str();
35     }
36     return 0;
37 }

这道题比较简单 注意全局变量默认赋初值0或者NULL

来源：https://www.cnblogs.com/lithium2020/p/12318772.html