Convert Decimal Number to Binary or Hex Without itoa function

Code

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

void print_base(uint16_t num, uint8_t base) {
    // Your logic here
    if(num == 0)
    {
        printf("0");
        return;
    }
    char buff[32];
    int i=0;
    while(num>0)
    {
        int digit = num % base;
        if(digit < 10)
            buff[i] = digit + '0';
        else
            buff[i] = (digit - 10) + 'A';
        i++;
        num /= base;
    }
    for(int j = i-1;j>=0;j--)
        printf("%c",buff[j]);

}

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

    print_base(num, base);
    return 0;
}

Solving Approach