99. Check if the String Numeric or Alphabetic

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

void classify_string(const char *str) {
    // Your logic here
    int i = 0;
    uint8_t has_digit = 0, has_alpha = 0, has_symbol = 0;

    if(!str || !*str) return;

    while(str[i] != '\0')
    {
        if(str[i] >= '0' && str[i] <= '9')
        {
            has_digit = 1;
        }
        else if(str[i] >= 'A' && str[i] <= 'Z' ||  str[i] >= 'a' && str[i] <= 'z')
        {
            has_alpha = 1;
        }
        else
        {
            has_symbol = 1;
        }
        if(has_digit && has_alpha || has_symbol)
        {
            printf("MIXED"); return;
        }
        i++;
    }

    if(has_digit) printf("NUMERIC");
    else if(has_alpha) printf("ALPHABETIC");
}

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++;
    }

    classify_string(str);
    return 0;
}