Check if the String Numeric or Alphabetic

Code

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

void classify_string(const char *str) {
    // Your logic here
    int di_flag = 0;
    int al_flag = 0;
    int m_flag = 0;
    while (*str)
    {
        if(*str >= '0' && *str <= '9') di_flag = 1;
        else if((*str >='a' && *str <= 'z') || (*str >= 'A' && *str <= 'Z')) al_flag = 1;
        else m_flag = 1; 
        ++str;
    }
    if(m_flag || (di_flag & al_flag)) printf("MIXED");
    else {
        if(di_flag) printf("NUMERIC");
        else 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;
}

Solving Approach