PAT (Advanced Level) Practise：1027. Colors in Mars

【题目链接】

People in Mars represent the colors in their computers in a similar way as the Earth people. That is, a color is represented by a 6-digit number, where the first 2 digits are for Red, the middle 2 digits for Green, and the last 2 digits for Blue. The only difference is that they use radix 13 (0-9 and A-C) instead of 16. Now given a color in three decimal numbers (each between 0 and 168), you are supposed to output their Mars RGB values.

Input

Each input file contains one test case which occupies a line containing the three decimal color values.

Output

For each test case you should output the Mars RGB value in the following format: first output "#", then followed by a 6-digit number where all the English characters must be upper-cased. If a single color is only 1-digit long, you must print a "0" to the left.

Sample Input

15 43 71

Sample Output

#123456

问题分析：

实际问题就是把10进制数转换为13进制数。

提交代码：

 #include <stdio.h>

 int decimal_to_other(int decimal, int base, char *other, int size)
 {
     char str[];
     int i, len, tmp;

     len = ;

     //while(decimal != 0)
     do {
         tmp = decimal % base;
         if(tmp >= )
         {
             str[len] = tmp -  + 'A';
         }
         else
         {
             str[len] = tmp + '';
         }
         len++;
         decimal /= base;
     } while(decimal != );

     for(i = ; i < len && i < size-; i++)
     {
         other[i] = str[len--i];
     }

     other[i] = '\0';

     return len;
 }

 int main(void)
 {
     int R, G, B;
     int rl, gl, bl;
     char r[];
     char g[];
     char b[];

     scanf("%d %d %d", &R, &G, &B);

     rl = decimal_to_other(R, , r, sizeof(r)/sizeof(r[]));
     gl = decimal_to_other(G, , g, sizeof(g)/sizeof(g[]));
     bl = decimal_to_other(B, , b, sizeof(b)/sizeof(b[]));

     printf("#");

     if(rl == )
         printf("");
     printf("%s", r);

     if(gl == )
         printf("");
     printf("%s", g);

     if(bl == )
         printf("");
     printf("%s", b);
  //printf("#%s%s%s", r, g, b);

     return ;
 }