PAT 甲级 1027 Colors in Mars（20 分） C++版

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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

简单题，使用除法和取余

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#include <cstdio>

int main() {
    char sign[] = "0123456789ABC";
    int a = 0, b = 0, c = 0;
    scanf("%d %d %d", &a, &b, &c);
    printf("#%c%c%c%c%c%c", sign[a / 13], sign[a % 13], sign[b / 13], sign[b % 13], sign[c / 13], sign[c % 13]);
    return 0;
}