Convert Integer to String

Code

#include <stdio.h>

// Convert integer to string and print each character with space
void print_integer_as_string(int num) {
    if (num == 0) {
        printf("0");
        return;
    }

    char buffer[12];  // Enough for -32768 to 32767
    int i = 0;
    int is_negative = 0;

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

    // Convert digits in reverse
    while (num > 0) {
        buffer[i++] = (num % 10) + '0';
        num /= 10;
    }

    if (is_negative) {
        buffer[i++] = '-';
    }

    // Print characters in reverse order with space
    for (int j = i - 1; j >= 0; j--) {
        printf("%c", buffer[j]);
        if (j > 0) printf(" ");
    }
}

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

Solving Approach