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 flag = 0;
    int i = 0;
    while(str[i] != '\0')
    {
        char curr = str[i++];
        if (curr >= '0' && curr <= '9')
        {
            flag |= 1;
        } else if ((curr >= 'a' && curr <= 'z') || (curr >= 'A' && curr <= 'Z'))
        {
            flag |= (1 << 1);
        } else 
        {
            flag |= (1 << 2);
        }
    }

    switch(flag) {
        case 1:
            printf("NUMERIC");
            break;
        case 2:
            printf("ALPHABETIC");
            break;
        default:
            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;
}