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) {
    if(num==0){
        printf("0");
    }
    char digits[17]="0123456789ABCDEF";
    char buffer[20];
    int i=0;
    while(num>0){
        buffer[i++]=digits[num%base];
        num/=base;
    }
    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;
}