1027. Colors in Mars (20)

题目：

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

解答：

//168=13*13-1也就是说每个数字最大只有两位，因此不用使用进制转换#include<cstdio>int main(){    char n[14]={"0123456789ABC"};    int a,b,c;    scanf("%d%d%d",&a,&b,&c);    printf("#%c%c%c%c%c%c",n[a/13],n[a%13],n[b/13],n[b%13],n[c/13],n[c%13]);    return 0;}