Parse Comma-Separated Integers into an Array

Code

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

int is_digit(char a){
    return ((a>=48) && (a<=57));
}
void parse_csv_to_array(const char *str, uint8_t *arr, uint8_t *count) {
    int i=0;
    int num = 0;
    while( str[i] != '\0'){
        if(is_digit(str[i])){
            num = ( num*10) +(str[i] -'0');
        }
        else{
            (*count)++;
            *arr = num;
            arr++;
            num = 0;
            

        }
        i++;

    }
    (*count)++;
    *arr = num;


}

int main() {
    char str[101];
    fgets(str, sizeof(str), stdin);

    // Remove newline
    uint8_t i = 0;
    while (str[i]) {
        if (str[i] == '\n') {
            str[i] = '\0';
            break;
        }
        i++;
    }

    uint8_t arr[20];
    uint8_t count = 0;

    parse_csv_to_array(str, arr, &count);

    for (uint8_t i = 0; i < count; i++) {
        printf("%u", arr[i]);
        if(i < count - 1){
            printf(" ");
        }
    }
    return 0;
}

Solving Approach