十进制转n进制n>=2&&n<=36

/*
2020年4月3日19:13:24
十进制转n进制 n >= 2 && n <= 36

输入规模为 2^63
*/

 1 #include<iostream>
 2 using namespace std;
 3 
 4 char str[36] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z'};
 5 
 6 int main()
 7 {
 8     long long num;
 9     while(cin >> num)
10     {
11         int x,t;
12         int i = 0;
13         char s[100];
14         cin >> x;  //几进制 
15         while(true)
16         {
17             t = num % x;
18             num /= x;
19             if(num == 0)
20             {
21                 s[i++] = str[t];
22                 break;
23             }
24             else
25             s[i++] = str[t];
26         }
27         cout << "i = " << i << endl;
28         for(int j = 0;j < i;j++)
29         cout << s[i - j - 1];
30         cout << endl;
31     }    
32     return 0;
33 }

EG:十进制:10 转换成 二进制:1010

​ (第一次) 10%2 = 0 , 10/2 = 5

​ (第二次) 5 % 2 = 1 , 5/2 = 2

​ (第三次) 2 % 2 = 0 , 2/2 = 1

​ (第四次) 1 % 2 = 1 , 1/2 = 0

这时候发现规律了吧----短除算法计算的结果是从低位开始的(逆序的)

posted @ 2020-04-03 19:59  树下一朵云  阅读(553)  评论(0编辑  收藏  举报