99. Check if the String Numeric or Alphabetic

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

void classify_string(const char *str) {
    // Your logic here
    uint8_t i = 0, isnumeric = 0, isalphabetic = 0, ismixed = 0;

    while (str[i] != '\0') {
        if ((str[i] >= 'a' && str[i] <= 'z') || (str[i] >= 'A' && str[i] <= 'Z')) {
            isalphabetic = 1;
        } else if (str[i] >= '0' && str[i] <= '9') {
            isnumeric = 1;
        } else {
            ismixed++;
        }
        i++;
    }
   
    if (isalphabetic && (isnumeric != 1) && (ismixed != 1)) {
        printf("ALPHABETIC");
    } else if (isnumeric && (isalphabetic != 1) && (ismixed != 1)) {
        printf("NUMERIC");
    } else {
        printf("MIXED");
    }
}

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;
}