117. Convert Integer to String

#include <stdio.h>

void print_integer_as_string(int num) {
    char str[20];
    if(num == 0){
        putchar('0');
        return;
    }
    if(num < 0){
        putchar('-');
        num *= -1;
        putchar(' ');
    }
    int i = 0;
    while(num){
        str[i++] = (num % 10) + '0';
        num /= 10;
    }
    i--;
    for(; i >= 0; i--){
        putchar(str[i]);
        putchar(' ');
    }
}

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