#include <stdio.h>

char *map[] = {
    "ling", "yi", "er", "san", "si",
    "wu", "liu", "qi", "ba", "jiu"
};

void display_num_with_pinyin(int num)
{
    char *stack[10] = {0,};
    int stack_top = 0;
    char *sign = "";
    if (num < 0) {
        sign = "fu ";
        num = -num;
    }
    for (; num; num = num / 10) {
        stack[stack_top++] = map[num % 10];
    }
    printf("%s", sign);
    while (--stack_top > -1) {
        printf("%s ", stack[stack_top]);
    }
    printf("\b\n");
}

int main()
{
    display_num_with_pinyin(-6543210);
    return 0;
}