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){
        putchar('0');
        return;
    }
    char buffer[17];
    int i=0;
    while(num>0){
        uint8_t digit=(num%base);
        if(digit<10){
            buffer[i]= digit+'0';
        }
        else{
            buffer[i]= (digit-10)+'A';
        }
        num/=base;
        i++;
    }
    for(int j=i-1;j>=0;j--){
        putchar(buffer[j]);
    }
}

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

    print_base(num, base);
    return 0;
}

Solving Approach