Convert Integer to String

#include <stdio.h>

void print_integer_as_string(int num) {
    char res[16];
    int i = 0;
    if (num == 0) {
        printf("0");
        return;
    }
    if (num < 0) {
        printf ("- ");
        unsigned int temp_num = -((unsigned int) num);
        num = (int) temp_num;
    }
    while (num > 0) {
        res[i++] = num%10 + '0';
        num/=10;
    }
    for (int j = i - 1; j >=0; j--) {
        printf ("%c", res[j]);
        if (j > 0) {
            printf(" ");
        }
    }
}

int main() {
    int num;
    scanf("%d", &num);
    print_integer_as_string(num);
    return 0;
}