116. Convert Decimal Number to Binary or Hex Without itoa function

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

void print_base(uint16_t num, uint8_t base) {
    char result[32];
    int i = 0;
    if (num == 0) {
        printf("0");
        return;
    }

    while (num > 0) {
        int rem = num % base;

        if (rem < 10)
            result[i++] = rem + '0';
        else
            result[i++] = rem - 10 + 'A';  // for hex digits A-F

        num = num / base;
    }

    // print in reverse order
    for (int j = i - 1; j >= 0; j--)
        printf("%c", result[j]);
}

int main() {
    uint16_t num;
    uint8_t base;
    scanf("%hu %hhu", &num, &base);

    print_base(num, base);
    return 0;
}