天干地支

#include <stdio.h> // printf
int main()
{
    char x[][4] = { "甲", "乙", "丙", "丁", "戊", "己", "庚", "辛", "壬", "癸" };
    char y[][4] = { "子","丑","寅","卯","辰","巳","午","未","申","酉","戌","亥" };
    int n;
    scanf_s("%d", &n);
    int a = n % 10;
    int b = n % 12;
    printf("%s%s", x[a], y[b]);
}