C - Issue converting a user generated number into words

Question

So I\'ve been working my way through Kochan\'s Programming in C and I\'ve hit a snag on one of the questions which reads as follows:

\"Write a program that takes an

Answer 1

My simple answer:

void printNum(int x)
{
    static const char * const num[] = {
        "zero ", "one ", "two "  , "three ", "four ",
        "five ", "six ", "seven ", "eight ", "nine "
    };

    if (x < 10) {
        printf(num[x]);
        return;
    }
    printNum(x / 10);
    printNum(x % 10);
}