Convert Integer to String

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#include <stdio.h>
#include <stdint.h>

void print_integer_as_string(int num) {
    uint8_t i = 0, j;
    char  buff[10];    //for 4 byte int
    if(num == 0){
        putchar('0');
        return;
    }
    if(num < 0){
        num = -num;
        putchar('-');  
        putchar(' ');
    }
    while(num){
        buff[i++] = '0' + (num % 10);
        num /= 10;
    }
    j = i;
    while(j--){
        putchar(buff[j]);
        putchar(' ');
    }
}


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

Solving Approach