Convert Integer to String

Code

#include <stdio.h>

void print_integer_as_string(int num) {
    char str[20];
    int i=0;
    int is_neg=0;

    if (num==0) {
        printf("0");
        return;
    }

    if (num<0) {
        is_neg = 1;
        num = -num;
    }

    while (num > 0) {
        str[i++] = (num % 10) + '0';
        num /= 10;
    }

    if (is_neg) {
        str[i++] = '-';
    }

    for (int j = i-1; j>=0; j--) {
        putchar(str[j]);
        if (j>0) printf(" ");
    }
}

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

Solving Approach