1027 Colors in Mars （20 分）
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 Specification:
Each input file contains one test case which occupies a line containing the three decimal color values.
Output Specification:
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 its left.
Sample Input:
15 43 71
Sample Output:
#123456题意：给出三个10进制的数字，将其转换为13进制的数据
解题思路：168对13进制来说最多2位，直接定义一个r[]="0123456789ABC"，第一位就是取下标为数字除以13的字符，第二个字符就是取下标为数字取余13的 字符
#include<bits/stdc++.h>
using namespace std;
int main(void)
{
char r[]="0123456789ABC";
int a,b,c;
scanf("%d %d %d",&a,&b,&c);
printf("#");
printf("%c%c%c%c%c%c",r[a/13],r[a%13],r[b/13],r[b%13],r[c/13],r[c%13]);
return 0;
}