PATA 1027 Colors in Mars

思路分析：
用一个字符串数组str存储0-9，A-C，str[i]对应i的字符串形式，将int型转换为char型

#include"stdafx.h"
#include
void func(int a) {
    char str[15] = "0123456789ABC", ans[5];
    int x, y;
    x = a / 13;
    y = a % 13;
    ans[0] = str[x];
    ans[1] = str[y];
    ans[2] = '\0';
    printf("%s", ans);
}
int main()
{
    int a;
    for (int i = 0; i < 3; i++) {
        scanf("%d", &a);
        if (i == 0) printf("#");
        func(a);
    }
    printf("\n");
    return 0;
}

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”