PAT 1027 Colors in Mars

#include <cstdio>
#include <iostream>
#include <cstdlib>

using namespace std;
char tbl[] = {    '0', '1', '2', '3', 
                '4', '5', '6', '7',
                '8', '9', 'A', 'B', 'C'};
void d213(int d, int &m, int &l) {
    l = d % 13;
    m = d / 13;
}

void print13(int m, int l) {
    printf("%c%c", tbl[m], tbl[l]);
}
int main() {
    int d = 0;
    int m, l;
    printf("#");
    for (int i=0; i<3; i++) {
        scanf("%d", &d);
        d213(d, m, l);
        print13(m, l);
    }
    return 0;
}

都是这样的题目世界该多美好