Convert Integer to String

#include <stdio.h>

void print_integer_as_string(int num) {
    // Your logic here
    char buffer[12];
    int i = 11;
    buffer[i] = '\0';
    unsigned int n = num > 0 ? (unsigned int)num : (unsigned int)(-num);

    if(num == 0) 
    {
        printf("0");
        return;
    }
    
    while(n > 0)
    {   
        i--;
        buffer[i--] = (n % 10) + '0';
        n /= 10;
        if(n > 0) buffer[i] = ' ';
    }
    if(num < 0)
    {
        buffer[i--] = ' ';
        buffer[i--] = '-';
    }
     
    printf("%s", &buffer[i+1]);
}

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